Letitia still wasn't sure. She looked at Sarah beseechingly. "It's all right," Sarah heard herself say. "If you have nothing to hide, you don't have anything to be afraid of. And if Mr. Fong says you were both there, Mr. Dudley will no longer be a suspect either."

With obvious reluctance, Letitia gave him the address. Sarah saw his surprise. It mirrored her own. Mr. Fong must attract a very elite clientele, indeed.

"I'll need to speak to Mr. Dudley, too, to verify what you've told me," he said. "Where can I find him?"

Letitia made a small sound of distress. "I ... I don't know where he lives. I can tell you where he works, but you mustn't call for him there. If the police come looking for him, he'll lose his job!"

"I'll make sure he doesn't lose his job," Malloy promised magnanimously.

Wiping a tear from her cheek, she gave him the name of the bank where Dudley was employed.

"Now, I need to ask you something even more difficult," Malloy said, his voice even kinder. Sarah was seeing a whole new side of him, and she was quite impressed, if a little disgusted.

Letitia lifted her chin and braced herself, as if for a blow.

"Can you tell me exactly what happened when you came home that day and found Dr. Blackwell?"

This time the color drained naturally from her face, and she shuddered slightly. "I came home, as usual," she said.

"How did you arrive?"

"I took a hansom cab," she said. "I always do."

"Who opened the front door for you?"

"No one. The servants were out. I opened it myself."

"Was it locked?"

"I ..." She tried to remember. "I'm sure it was, but I can't remember. I have a key, so I probably used it."

"Go on," he urged.

"I came in, and the house was very quiet. I ... I took off my gloves and my hat. Then I saw that ... the study door was closed. It was only closed when Edmund was inside. I almost didn't ..."

"You almost didn't what?" he prompted when she hesitated.

"I almost didn't open the door. He didn't really care where I was or when I came home, but I thought ... I thought he should care, and so what if I interrupted him? He should pay attention to his wife. So I knocked on the door and called his name."

"But he didn't answer," Malloy guessed. "What did you think?"

"I thought perhaps he wasn't in there. Or that he hadn't heard me. I don't know what I thought. But I had the strangest feeling, as if something was wrong. At least I think I did. Maybe that was just afterward. But I opened the door. I was just going to tell him I was home and make him pay attention to me, just for that moment. And then I saw him-"

Her voice broke, and even Sarah wanted to spare her this gruesome memory, but Malloy pressed her.

"This is very important, Mrs. Blackwell," he said. "Did you see or hear anyone else in the house? Did someone run out or did you hear a door open or close? Anything like that, any noise at all?"

"I ... I don't remember. I just remember I started screaming, and I ran outside and I saw the beat officer, and ... and that's all I know." A lone tear slipped down her cheek, and she made no effort to wipe it away, silently reminding Malloy of her pain.

"Thank you, Mrs. Blackwell. That's all I'll need for now," he said. "I hope this hasn't caused you too much distress."

"Oh, no, not at all," Letitia said, pulling herself together bravely. "You've been very kind. I'm sorry I couldn't help you more, but I'm happy for the opportunity to remove any suspicion from Mr. Dudley."

Sarah couldn't help thinking that she would also be removing suspicion from herself if Fong gave them both an alibi, but she merely smiled and helped Letitia to the door, where her maid was waiting to escort her upstairs. As soon as she'd closed the parlor doors behind them, she turned to Malloy.

"Did you have to be so hard on her, Malloy?"

He didn't appreciate her sarcasm. "If she'd started bawling, we never would've gotten the address of the opium den," he said reasonably. "But did you have to tell her to give Dudley an alibi, too?"

"If they weren't together, this Mr. Fong will tell you," she pointed out just as reasonably. "And I don't think she would've given you Fong's address just to protect herself. She's too afraid of him. And as she said, everyone knows she wasn't here when Blackwell was killed, so it doesn't really matter where she really was."

"Actually, everyone doesn't know she wasn't here. They know she went out, and they know she discovered the body, but the servants weren't here during the murder, so how does anyone know she didn't come home earlier than she said?"

He had a point, but Sarah didn't think it would hold. "Can you really imagine her brazenly blowing her husband's brains out and then arranging everything very neatly to make it look like suicide?"

"Stranger things have happened," was all he'd say. "Now I have to go see this Mr. Fong."

"I've never been in an opium den," Sarah said hopefully.

"You're not going in one today, either," Malloy said.

11.

FRANK WAS ACCOMPANYING SARAH BRANDT TO the Blackwells' front door when someone knocked on it. The butler, who had been waiting to see them out, seemed annoyed at the interruption. Probably he was afraid it might delay their departure. Granger looked as if he hadn't quite recovered from his recent illness and lacked the strength to deal with one more problem visitor.

He opened the door to Amos Potter. The man looked as surprised to see them as they were to see him.

"Is something wrong?" he asked, his gaze darting anxiously between the two, as if trying to decide what event might have summoned both of them.

"Not at all," Frank assured him. "And I'm glad you stopped by. I needed to speak with you anyway."

"I hope you have some good news," Potter said, handing his hat to the butler, who took it with a reluctance Potter didn't notice. "This has gone on far too long already. How much longer do you think Mrs. Blackwell can endure the strain after all she's been through?"

"She seems to be holding up very well," Frank remarked.

"And how would you know?" Potter sniffed.

"I spoke with her just a few moments ago," Frank told him, knowing how outraged Potter would be, since he himself had not seen the lovely widow since her husband's demise.

As he'd expected, Potter was furious. "How could you have allowed this, Mrs. Brandt?" he demanded.

For once, Sarah Brandt did exactly the right thing. She smiled sweetly-well, sweetly for her, at least-and said, "Mrs. Blackwell was only too happy to assist Mr. Malloy in his investigation."

Potter blinked a few times as he absorbed this information. "Is Mrs. Blackwell receiving visitors now?" he asked after a moment, his belligerence gone.

"Not regularly," she said, still looking like butter wouldn't melt in her mouth, "and I'm sure she's exhausted after meeting with Mr. Malloy today, but if you feel you must see her, perhaps she could receive you tomorrow ..."

"Tomorrow, yes, of course," Potter agreed with the air of a boy hardly able to wait for Christmas morning. "There are so many things I need to discuss with her."

"I'm sure there are," she said politely. "I hope you'll excuse me now. I have other patients to see."

"Of course, of course. Would you like Granger to call you a cab?" Potter generously offered.

"I'd prefer to walk. Thank you anyway. Good day."

With a sly grin at Frank, she was gone. He managed not to sigh in relief. He only hoped she had the sense not to hightail it up to see Mr. Fong. Although, when he thought about it, he should hope that for Mr. Fong's sake, since he was fairly sure Sarah Brandt could take care of herself, even in an opium den.

"Why don't we go into the office," Potter suggested, and Frank readily agreed. He didn't want the snooty butler overhearing.

Frank noticed how naturally Potter took his place in the chair behind the desk where Edmund Blackwell had died. If he felt any discomfort at sitting in the very chair where his former partner had been murdered, he hid it well. He motioned for Frank to take the wingback chair in front of the desk.

"Now, what news did you have for me?" he asked, folding his hands expectantly.

Frank had no trouble at all looking grim. "Calvin Brown is dead."

"Dead?" Potter seemed more confused than anything else. "Calvin? You mean Edmund's son?"

"That's right. He died yesterday, very early. Probably during the night, actually." Frank waited for a reaction and for the questions that should naturally follow.

For a moment Potter seemed uncertain what to say next. "But what ... ? Was he ill? This is very sudden."

"No, he wasn't ill. He died of arsenic poisoning."

"Arsenic? Good heavens, that's rat poison, isn't it? How on earth did he ... ?" He paused, considering. "Did he take his own life?"

"Why would you think that?" Frank asked, fishing even though he knew he was probably wasting his time.

"Because that's what a killer is likely to do, isn't it?" he asked confidently. "Someone who cannot bear the weight of his guilt anymore might choose to end his own suffering. And poison-one hardly ever hears of a murder by poison. Do you think he killed himself, Mr. Malloy? Out of remorse?"

"It appears that he did take his own life," Frank admitted. "The box of rat poison was in his room, and he'd drunk it in a bottle of sarsaparilla. He didn't call for help when he became ill. All things considered, it looks like he died by his own hand."

"I don't suppose he left a note confessing to his father's murder, by any chance?" Potter asked hopefully. "That would be too neat."

"You're right," Frank said. "That would be too neat."

Potter studied Frank for a moment, as if trying to judge him somehow. "You did look for a note, I hope. He may have hidden it."

"I went through everything in his room," Frank said quite truthfully.

Now Potter looked perplexed. "But it's obvious, isn't it? The boy took his life out of guilt. What other reason could he have had?"

"I don't know of any," Frank admitted. As far as he knew, Calvin had no reason at all to kill himself.

Potter looked extremely relieved. "As tragic as this is, it couldn't have worked out better. For Mrs. Blackwell, I mean. Consider the scandal if the boy had been put on trial. Everyone would have known that her marriage was bigamous and her child ... Well, we can be thankful she will be spared all that. The boy did her a kindness by taking his life."

"Mrs. Blackwell seems to attract men willing to do her kindnesses," Frank observed, but Potter didn't seem to understand the reference.

"Now there is the matter of the reward," Potter said, all business again. "Although you didn't actually capture the killer, you have identified him and closed the case satisfactorily. That, I believe, entitles you to at least half of the reward. For your trouble, Mr. Malloy," he added with a condescending smile.

The offer was generous, since most people would have refused to pay anything at all under the circumstances. Frank remembered Brian's surgery and knew he could use the money. But still ...

"I'm afraid I can't accept any reward for this," he said, even though the words wanted to lodge in his throat.

"What? Why not?" Potter asked in astonishment.

"Because I'm still not convinced Calvin is the killer."

"But if he confessed ..." Potter gestured helplessly.

"He didn't confess," Frank said, wondering if Potter knew more about this than he should.

"His very suicide is a confession," Potter insisted, fingering his watch fob anxiously. "You said so yourself!"

Frank knew he hadn'st, but he didn't want to argue. "I have a few more people to question before I can be sure."

"Honestly, Mr. Malloy, most police detectives are only too happy to solve a case! I can't believe any of them would want to keep investigating when the killer has already been discovered."

What he meant, of course, was that most detectives would grasp any solution to a case, correct or not, in order to collect a reward. Frank didn't like to think he'd ever done such a thing. His standards weren't high, but at least he'd never knowingly punished an innocent man. Still, he'd sometimes taken the wrong guilty man, a man who perhaps hadn't committed the crime he was investigating but had committed many others for which he was unpunished. At some point the truly guilty party would be punished for something else. Guilty men were punished, one way or another, and it all worked out in the end.

And once he might not even have looked quite so closely at a case like this. He might not have even noticed that Blackwell's death was a murder in the first place. No one wanted it to be, least of all those closest to him. Frank had changed a lot, and he knew perfectly well when and why.

Sarah Brandt was ruining him.

"It wouldn't be right to blame Calvin for his father's murder if he didn't do it," Frank pointed out. "Think of his mother."

"I don't know his mother, but I do know Mrs. Blackwell. She is the one whose welfare I must consider. I'm afraid if you insist on pursuing this matter, I must withdraw the reward entirely."

"You do what you think is right, Mr. Potter," Frank said without the slightest regret. Virtue might really be its own reward, but Frank was thinking more about Sarah Brandt's favor, which seemed an even greater reward. "Mrs. Blackwell is very lucky to have you looking out for her interests, Mr. Potter," he added without the slightest trace of irony. "Will you break the news to her that her husband's killer has been found?"

Plainly, Potter hadn't considered this possibility. "I ... well, I suppose it's logical for me to be the one to do so."

"And does she know who Calvin Brown was?" Frank asked blandly.

Potter seemed confused again, but only for an instant. "Certainly not! Letitia has no idea that Edmund was married before, much less that he had a family."

"Then how will you explain that his son killed him?"

Potter started to bluster. Frank wasn't sure if he was angry or merely confounded. "You ... I ... It really isn't my place ... I mean, perhaps it would be more appropriate for her father to ..."

"Perhaps you're right," Frank agreed. "I was just going to inform Mr. Symington of Calvin's death as well. Should I mention to him that it's his fatherly duty to inform Mrs. Blackwell?"

"But Mr. Symington knows nothing of this either," he protested.