"What do you propose to do now?"

"Well, what about working out the precise nature of the link between Harkness, Keenan and Reid?"

Instead of replying, he pushed the tea tray towards her and said, "Will you pour?" The familiar rituals helped to smooth things between them: tea, cream and sugar, sandwiches, cakes. Once their hands were occupied with small matters, it was easier to pretend their thoughts were, too.

"We might be jumping to conclusions about Harkness," said Mary at last, when it seemed that James intended to stare into his teacup for ever. "As you said before, Reid might have filched the envelope from his desk."

He nodded slightly. "But if Harkness is truly innocent, I don't understand why he hasn't reported the thefts. Or sacked Keenan and Reid. He's involved with them, and it seems personal."

"Well, he does seem to feel a sense of responsibility towards the men. Towards Mark Quinn, for example a trying to teach as well as employ."

"True." James crumbled a scone with his long fingers. "So perhaps he's trying to lay a trap for them, or persuade them to give up their bad ways?"

"Possibly. All I'm saying is, why not try to learn more about their connection before a.s.suming the worst? If you report your suspicions to the police and Harkness turns out to be blameless, you'll never forgive yourself."

"Neither will he," he said with the faintest of smiles. The clock on the mantel chimed six o'clock in silvery tones. Both looked at it, then at each other, with surprise. "I'm dining at Harkness's home tonight. I might learn something there." He drained his teacup, set it down decisively, and flashed her a charming grin. "Care to join me?"

"Wearing your nightshirt?" she laughed.

"Oh, you won't need it."

"I beg your pardon?!" She felt the blush wash over her in a swift, comprehensive wave.

"Tut tut, Miss Quinn a not as pure of mind as a young lady ought to be."

"You must be terribly disappointed."

He laughed aloud at that, a sound of pure joy. "Never less so in my life."

Another great roll of warmth rippled through her body and she couldn't stop smiling. "Go on, then a how am I to join you this evening?"

"As Mark Quinn, of course. I'm surprised you had to ask."

Twenty-one.

Leighton Crescent, Tufnell Park The Harkness home was a broad, blocky villa in Tufnell Park, part of a tightly packed estate built a decade before. Viewed together, the houses reminded Mary of nothing so much as a row of false teeth plonked into a field. Or perhaps that was simply her jaundiced eye. Despite tonight's promise of adventure and discovery, she was exhausted. And even after a large dose of willow-bark powder, her headache continued to swell, pounding against her temples in time with her footsteps. Her mouth was dry and thick. Either she was falling ill, or these were the after-effects of too much drink. Perhaps there was something to Harkness's teetotalling gospel, after all.

She pulled her cap lower over her eyes and considered the house before her. Despite the lingering dusk, for it was not yet eight o'clock, the house was brightly lit, as for a party. A neat row of carriages lined the street just outside. The first-floor curtains were still open, and ladies and gentlemen in evening dress paraded back and forth in the large windows. As she strolled past the house, a fourth carriage drew up and disgorged a stout mother-and-daughter pair. They were quite spectacularly alike, from their bulging eyes to their jewelled silk slippers. Although the evening was far from cold, each had a stole wrapped about her neck, the fur slightly wilted now in the humid evening.

The mother frowned at the house. "Well, I suppose it's not a bad size a but my dear! The location!"

Mary paused to watch as a footman opened the door to them. The hall blazed with gaslight and she received a fleeting impression of plenty of highly polished ornaments before the door closed once again. Quickening her pace now, she walked to the corner of the road and turned into the back alley. Even if she hadn't known which house was Harkness's, it would have been evident from the extraordinary level of light and noise emanating from its grounds.

The hum of conversation floated out of the first-floor windows, punctuated by barks of masculine amus.e.m.e.nt and the occasional bright squeal. At times, this was nearly drowned out by the clatter and half-panicked exclamations of servants on the lower levels. As Mary stopped to listen again, there came a smash of crockery and a cry of dismay, followed by ugly haranguing and then, perhaps inevitably, the wail of a slapped woman. Nearer her, the stable was alive with the whickering of horses and the rustle of hay, and even the quiet whistling of a man at work. He had by far the best job this evening. The atmosphere in the house was clearly fraught, she could tell even from here.

The noise and chaos were to her advantage. She'd been worried about gaining access without lock-picks or a skeleton key; people were generally so careful about keeping doors and windows locked. But tonight, the first window she tried slid up quite easily. She found herself inside the darkened breakfast room. The door had been left ajar and, in the corridor, feet pounded swiftly up and down with rather less grace and discretion than generally desired. One could almost measure the distance between the private and public s.p.a.ces of the house by listening to the point at which the footsteps slowed, the hissed instructions ceased, and a harried expression was smoothed to a mask of impa.s.sive calm.

This was all very well, thought Mary, crouching behind the door, but if the servants didn't stop scampering past, she'd never be able to leave the breakfast room. The clock on the mantel, a squat thing heavily embellished, ticked off the minutes. Five. Ten. A quarter-hour. And then came a different sort of stampede a languid of pace, brightly chattering a down a staircase near the front of the house: the guests going in to dinner. Another five minutes and through the wedge of open door, Mary saw a pair of footmen bearing soup tureens, moving with perfect sangfroid a a denial of the frantic scurrying she'd witnessed earlier. When the dining-room doors closed, Mary peered out into the hallway. Empty. She had a good interval while this course was served. If she didn't move now, she'd be caught in the changeover between soup and fish.

The corridors were wainscotted in dark wood and papered in a smudged floral design that looked a peculiar greeny-brown by gaslight. The house, so far, seemed a testament to someone's violently rich tastes: ornate rosewood breakfast table and chairs, enormous tiered chandelier in the entry hall, walls jammed with paintings in gilded frames. Mary's eyes widened as she noticed a suit of armour a an actual suit of armour! a standing sentry by the broad staircase. It seemed a far cry from Harkness's rather puritanical posture on site. She walked on, wide-eyed. Surely this faint, stirring queasiness owed as much to the decoration as to all that beer this afternoon...

Fortunately, there were only so many places to locate a study in a house like this. In rambling, aristocratic homes, one could wander for ever before finding the correct wing, let alone the study door; in the slums, one could become thoroughly lost in the rabbit warren before working out which families shared which rooms. But in square bourgeois houses like this, thought Mary, the study was generally a here.

The doork.n.o.b turned easily in her hand, and not a moment too soon. Far down the corridor, she heard an approaching half-shuffle, half-scurry. A servant retrieving or delivering something. Quickly, she slipped into the room, closed the door behind her and turned the key. It took a while for her eyes to adjust, and in those few seconds she had a sudden, vivid recollection of her first meeting with James. In the dark. In a study. In a wardrobe. She shivered slightly, and the room suddenly felt cool. Her headache, though, was beginning to lift.

She had a candle stub and a box of lucifers in her pocket. Though the single small flame seemed meagre after the yellowy glare of the rest of the house, it was enough. And as the details of the room became visible, she was thoroughly startled. She'd expected a study to match the rest of the house: a cacophony of the most expensive and oppressive furnishings one could buy. What she saw, instead, was a room as austere as a monk's cell. No Turkish carpet, no wallpapers, no vases or figurines or paintings. Just a wide, slightly battered desk and a few mismatched filing cabinets. There was nothing here to make the room comfortable. Not so much as a cushion on the upright desk chair.

Harkness's office at the building site was essentially a haystack of rumpled papers that threatened to subsume the furniture. Here, today's Times lay folded at one corner of the desk and there were no other papers in sight. Mary shivered again. There was something pathetic about the contrast, as though Harkness spent little time here, or as though a ruthless domestic routine had purged the room of his personality. And yet...

As she looked about the room in amazement, Mary realized that this room did indeed belong to Harkness. This was the study of a man who denied himself wine, who did his clumsy best to help his workers do the same (regardless of whether they wished to), who wanted to help Mark Quinn better himself. The blotter on the desk was covered in those black-and-white triangles, layer upon layer of them, a testament to the fidgety frugality of the man who worked in that s.p.a.ce. She stood there in wonder, simply staring at the room, for a few minutes. Then, across the hall, the dining-room door clicked open and the burble of conversation grew loud. Despite its showy decoration, the walls in this house were thin.

Right. Time to start. Her first act was to unlatch the window, in case she should need to make a rapid exit. After that, however, her momentum faltered. Somehow, she was loath to inspect Harkness's filing cabinets, to sift through his personal correspondence. This wasn't the first time she'd felt these sorts of scruples: she'd struggled before with the notion of prying, but always managed to justify it because she was trying to do right; to uncover truths. But tonight, in this sad, bare cell, she found herself suddenly in doubt.

It wasn't that she thought Harkness blameless. He was certainly linked to Keenan and Reid, and if he was trying to combat their thefts he'd chosen a very strange and indirect method. He was much more likely to be co-operating with them. But there was something tragic about this study. Mary felt that she'd somehow stumbled onto a distressing personal secret just by entering the room.

Nevertheless, she was here, and this was her task. The desk drawers glided smoothly, rather to her surprise. She'd half-expected them to be stiff with age and disuse. The top drawer held the usual bits: pens, pen-wipers, an extra bottle of ink, the rules and T-squares and protractors of the architectural draftsman. She opened the other drawers: writing-paper. A handful of loose penny stamps. A postcard from Margate from someone signing herself "Hetty". A file of newspaper clippings about the clock tower (favourable mentions only). And, finally, in the bottom drawer, the things she'd been looking for, stacked neatly one on the other like presents.

Cheque book and register.

Bank book.

She paused to listen to the dinner party under way. The rumble of polite conversation swelled and ebbed like a tide, interrupted occasionally by laughter. One man had a high, yipping, nasal sort of laugh which sliced through the rest, through the walls of the house, so that Mary felt as though she were seated next to him at table. She wondered who that might be, and whether he would ever be asked back. She wondered how James was faring, as a reluctant guest at the Harkness table. She wondered- She hadn't time to wonder, and abruptly opened the cheque book. Harkness wasn't a man for writing cheques except to cash, and if the monthly sums were surprisingly large, they were also fairly consistent. Although ... Mary flicked back a page or two in the register. There had been a steady increase in the amount of cash Harkness had required over the past year. Increased household expenses, she supposed; the cost of supporting a large family. Or perhaps the redecoration of the house, or new clothing for all the family. The Harknesses certainly seemed to enjoy shopping. Although the numbers seemed high to her, Harkness might have private means to supplement his salary.

However, the bank book told a different story. The last entry, dated perhaps six months earlier, showed Harkness to be two hundred pounds overdrawn. Two hundred pounds would be a what? A third, or even half, of his annual salary. It was certainly more than most men earned in a year, and much more than Peter Jenkins could ever hope to see in his lifetime. And there were no further entries showing it as paid off.

She began to rifle through the remaining drawers now in earnest, looking for other doc.u.ments. If Harkness had gone into overdraft six months ago and not repaid the money, there would be other loans. Loans from family members or friends, loans from banks, perhaps even a loan from the sort of private moneylender who served only the desperate. All her reluctance had fallen away, now, and she had to force herself to slow down. To search methodically. To handle only what was necessary. After all, one couldn't scrabble quietly.

In the end, she found only a memorandum book. It was large and quite empty, with the occasional appointment ("Dr Fowler, 11") or family anniversary ("Amy's birthday") recorded. But as she flicked through the pages to July, a genuine sense of urgency surged through her veins. The last remaining page in the book was Sunday, 10 July: tomorrow. It, too, was blank. But every following page had been torn out. According to Harkness's diary, there was no future. She stared at the book, possible interpretations flooding her brain. It was clearly the end of something: the end of his involvement with Keenan's gang. But apart from that obvious starting-point, there was no sign of what he intended.

She stood and stretched muscles stiff from long crouching. As she did, a squiggle at the edge of the blotting pad caught her eye. It was so unlike all the other marks on the pad: a looping, dramatic flourish that stood out in contrast to Harkness's tense, scratchy penmanship. It looked like somebody else's handwriting, yet it was the only indication that a second person had used this blotter. She bent to inspect the ink mark, frowning. Ran a finger over it, mentally reversing the letters. At that, her eyes widened. Good Lord. Could it be? It seemed rather far-fetched, but it was certainly possible. Yes.

Although it was a large risk, she tore away the edge of the top sheet of paper, removing the mark in question, and slipped it into her pocket. She turned to leave, then had a second thought. From the stationery drawer, she carefully withdrew a single sheet of writing-paper and pocketed that, too. Another rumble of laughter erupted from the dining room, that same hyena laugh making gooseb.u.mps rise on the back of her neck. As she eased out of the study window and dropped quietly into the shadowy garden, Mary hoped that James enjoyed at least part of his evening here. For what she was about to suggest to him would certainly spoil his night.

Twenty-two.

That laugh! That piercing, grating, hysterical yipping. James had seldom heard anything like it, and certainly not from Harkness. The man had always been sober. Earnest. Pompous, even. And now the sound of his mad laughter rang ceaselessly in James's ears as he and Barker drove through Tufnell Park, on the lookout for a small lad in the dark.

Mary was at the meeting point they'd arranged, a few yards from a quiet-looking pub in Leighton Road. She'd been all for somewhere less noticeable a a park or a church, say a but James had prevailed, saying it would be easier for her to blend in near a busy shop-front. He'd not dared admit he was worried for her safety in a dark, deserted park. She was a tricky, stubborn proposition, Mary Quinn, and despite his anxiety, at the thought of her a deep excitement stirred within him.

"Good dinner?" she asked, as she climbed in. The carriage, which hadn't entirely stopped, now accelerated smartly towards Bloomsbury and home.

He shrugged. It had been a good meal, as far as food was concerned, although the total absence of wines and spirits had been strange indeed. The sweet, fruit-flavoured drinks accompanying the meal had made it seem rather a children's party, and eating Stilton without a gla.s.s of port had seemed rather pointless. "I'm worried about Harkness. He seems to have gone completely round the bend."

Mary's eyes went round. "The mad laughter a that was Harkness?"

James nodded. "Telling desperately poor jokes, and then laughing at them. His wife hadn't the faintest idea what to say or do, and neither did the rest of us."

"Any idea what...?"

"What made him behave like that? Well, he wasn't tipsy, that's certain."

"The pressures of the building site..."

"They're not new. He's been on that job for years, now." She was silent, then, looking at him with concern in those luminous eyes. He felt a sudden impulse to bury his face in her neck and weep. Instead, he looked out of the window, concentrating on the gaslamps as they whizzed past. Each light was surrounded by a gauzy yellow halo that vanished when he blinked. "His behaviour. The account books. Everything points to his guilt, doesn't it?"

For answer, she fished in a pocket and offered him something with an apologetic look. "I also found these."

He took the items with some puzzlement. They didn't look like much: a long strip of thick blotter paper, much used and re-used; a blank sheet of writing-paper. As he studied the sc.r.a.p, though, the sinking dread that had attended him all evening came into sharp focus. His stomach rolled queasily and he cursed under his breath. "You tore this from his blotter?"

She nodded. "I'm sorry."

"Why should you be?" he said fiercely. Turning his attention to the blank sheet, he stroked the watermark with tingling fingertips. "Confirmation," he said softly.

It wasn't a question but she nodded nevertheless. "It could be an accident..."

"The First Commissioner's signature neatly blotted on Harkness's pad a that's an accident?"

"He could have called upon Harkness," said Mary quickly. "Borrowed his desk to write a letter."

"He could have borrowed a sheet of paper, if it comes to that."

"That's true," she said slowly. "It would be simple to verify a visit to Harkness's house."

Abruptly, he crumpled the page he'd been holding so carefully. "False hope. If the Commissioner was in such a rush to appoint me to the safety review, he'd never have driven all the way out to Tufnell Park to write a letter. He'd have done so from his office, beside Palace Yard. No. This is clear evidence that Harkness forged my letter of appointment. And if he's forging letters from the Committee of Works, G.o.d only knows what else he's up to." He looked at Mary's reluctant expression and groaned. "Oh Lord a you've more to say, haven't you?" Mary's gaze dropped towards his hands, and he wished she'd look up again. As much as he hated this conversation, it was easier when he could see her eyes.

"Tell me about Harkness," she said quietly.

James paused for a moment. "A friend of my father's. A decent engineer, but not a brilliant one. Devout Christian. Wife. Children a four, I think, about my age and younger. Bit of a clot, but well-meaning, and a sound man." His mouth twisted. "Or so I thought."

"Has he money? Or rich relations?"

James shook his head, mystified. "Don't think so. He's always made a virtue of being a professional man, not an idle aristocrat. You know."

"So he's unlikely to have a private income."

"Just what are you suggesting, Mary?"

Her gaze was still averted, slim hands clasped tightly against her knee. "What did you think of his house?"

"What is this?!" He grasped her arms and tried to make her look at him. "What are you insinuating?"

"I'm looking for motive," she said calmly, not the least frightened of his explosion. "Tell me what you thought of his house. Its contents. The decorations."

He looked at her blankly. "It was just a house. A bit oppressively frou-frou, but Mrs Harkness has always been like that. A dozen lace doilies where none is needed, that sort of thing. Bad taste isn't criminal."

"But the cost of their furnishings ... didn't you notice? All those bra.s.ses, and faux-medieval statues, and carved wooden furniture, and gold-plated everything? What about the dinner service and the candelabra? Could an engineer's salary pay for all that?"

James frowned. "I don't shop. I don't know the cost of things."

"Trust me, James a they're dear. Even if hired or bought on the cheap, the contents of that house are worth a small fortune because there's so b.l.o.o.d.y much of the stuff."

He closed his eyes for a long moment and listened to the silence in the carriage. Beyond it, there was the clop of horses' hooves, the racket of carriage wheels on cobblestones, the swelling sounds of the town as they neared the city lights. Just now, the quiet within was more oppressive than all of these. "So we have motive: greed."

"Or desperation." Mary's voice was careful, gentle, as she made her point. He almost wished she'd be brutal about it. "Harkness's study was entirely different: bare, uncarpeted, underfurnished and utterly uncomfortable. Doesn't that suggest a man who disagrees with his family's expensive tastes?"

James considered. "His children have large allowances. Son at Cambridge, daughters at finishing school. And Mrs Harkness was spattered with jewellery, now you mention it."

"So we've a man trying to accommodate his family's desires..."

"And failing. On his salary, at least."

"But it seems rather forced on him. The study, at least, suggests that Harkness doesn't share their tastes and would live differently, given the choice."

James felt a sudden, deep weariness. "Every man has a choice."

"But if it means denying his family, or making them unhappy..."

"Then it's his responsibility to do so," he said severely. "A man must live by his values. Especially when he's as public and do-gooding about them as Harkness was. Is."

There was a silence. Then Mary placed a hand on his and said softly, "It's a fine philosophy. But perhaps he realized what was happening only when it was too late. He's clearly a man under enormous pressure a his behaviour at dinner, for example."

"Why are you so intent on defending him?" asked James, suddenly irritable. "We're talking about a man whose greed compromised the safety of a building site; who may have caused the death of one of his labourers, all because he wanted some gold-plated candlesticks."

"What if he didn't? What if Wick jumped, or was pushed by Keenan or Reid, and the compromises Harkness made didn't have a thing to do with Wick's death?"

"Then Harkness is still morally culpable. And when I turn in my safety review, the authorities and the world are going to conclude the same, no matter what excuses you concoct."

She withdrew her hand swiftly. Sat back, shoulders straight, spine erect. "I'm not excusing anything, just searching for the real cause of Wick's death. And perhaps a little compa.s.sion is in order here, as opposed to..."

"Go on. You may as well say it."

"Unbending sanctimony."