"Oho!" commented Cleek. "Got her wits about her, that lady, evidently.

Find anything at the Crystal Palace Low Level, Mr. Narkom?"

"Yes. My dear Cleek, I don't know whether you are a wizard or what, and I can't conceive what reason you can have for making such an inquiry, but----"

"Which was it? Canoe or ironing-board?"

"Neither, as it happens. But they've got a lady's folding cutting table; you know the sort, one of those that women use for dressmaking operations; and possible to be folded up flat, so they can be tucked away. n.o.body knows who left it; but it's there awaiting an owner; and it was found----"

"Oh, I can guess that," interposed Cleek nonchalantly. "It was in a first-cla.s.s compartment of the 5.18 from London Bridge, which reached the Low Level at 5.43. No, never mind questions for a few minutes, please. Let's go and have a look at the body. I want to satisfy myself regarding the point of what in the world Stavornell was doing on a suburban train at a time when he ought, properly, to be on his way home to his rooms at the Ritz, preparing to dress for dinner; and I want to find out, if possible, what means that chap with the little dark moustache used to get him to go out of town in his ordinary afternoon dress and by that particular train."

"Chap with the small dark moustache? Who do you mean by that?"

"Party that killed him. My 'phone to London Bridge station has cleared the way a bit. It seems that Lord Stavornell engaged that compartment in that particular train by telephone at three o'clock this afternoon. He arrived all alone, and was in no end of a temper because the carriage was dirty; had it swept out, and stood waiting while it was being done.

After that the porter says he found him laughing and talking with a dark-moustached little man, apparently of continental origin, dressed in a Norfolk suit and carrying a brown leather portmanteau. Of course, as the platform was crowded, n.o.body seems to have taken any notice of the dark-moustached little man; and the porter doesn't know where he went nor when--only that he never saw him again. But I know where he went, Mr. Narkom, and I know, too, what was in that portmanteau. An air pistol, for one thing; also a mallet or hammer and that wet cloth we found, both of which were for the purpose of smashing the electric light globe without sound. And he went into that compartment with his victim!"

"Yes; but, man alive, how did he get out? Where did he go after that, and what became of the brown leather portmanteau?"

"I hope to be able to answer both questions before this night is over, Mr. Narkom. Meantime, let us go and have a look at the body, and settle one of the little points that bother me."

The superintendent led the way to the siding where the shunted carriage stood, closely guarded by the police; and, lanterns having been procured from the lamp-room, Cleek was soon deep in the business of examining the compartment and its silent occupant.

Aided by the better light, he now perceived something which, in the first hurried examination, had escaped him, or, if it had not--which is, perhaps, open to question--he had made no comment upon. It was a spot about the size of an ordinary dinner plate on the crimson carpet which covered the floor of the compartment. It was slightly darker than the rest of the surface, and was at the foot of the corner seat directly facing the dead man.

"I think we can fairly decide, Mr. Narkom, on the evidence of that,"

said Cleek, pointing to it, "that Lord Stavornell did have a companion in this compartment, and that it was the little dark man with the small moustache. Put your hand on the spot. Damp, you see; the effect of some one who had walked through the snow sitting down with his feet on this particular seat. Now look here." He pa.s.sed his handkerchief over the stain, and held it out for Narkom's inspection. It was slightly browned by the operation. "Just the amount of dirt the soles of one's boots would be likely to collect if one came with wet feet along the muddy platform of the station."

"Yes; but, my dear chap, that might easily have happened--particularly on such a day as this has been--before Lord Stavornell's arrival. He can't have been the only person to enter this compartment since morning."

"Granted. But he is supposed to have been the only person who entered it after it was swept, Mr. Narkom; and that, as I told you, was done by his orders immediately before the train started. We've got past the point of 'guesswork' now. We've established the presence of the second party beyond all question. We also know that he was a person with whom Stavornell felt at ease, and was intimate enough with to feel no necessity for putting himself out by entertaining with those little courtesies one is naturally obliged to show a guest."

"How do you make that out?"

"This newspaper. He was reading at the time he was shot. You can see for yourself where the bullet went through--this hole here close to the top of the paper. When a man invites another man to occupy with him a compartment which he has engaged for his own exclusive use--and this Stavornell must have done, otherwise the man couldn't have been travelling with him--and then proceeds to read the news instead of troubling himself to treat his companion as a guest, it is pretty safe to say that they are acquaintances of long standing, and upon such terms of intimacy that the social amenities may be dispensed with inoffensively. Now look at the position of this newspaper lying between the dead man's feet. Curved round the ankle and the lower part of the calf of the left leg. If we hadn't found the key we still should have known that the murderer got out on that side of the carriage."

"How should we have known?"

"Because a paper which has simply been dropped could not have a.s.sumed that position without the aid of a strong current of air. The opening of that door on the right-hand side of the body supplied that current, and supplied it with such strength and violence that the paper was, as one might say, absolutely sucked round the man's leg. That is a positive proof that the train was moving at the time it happened, for the day, as you know, has been windless.

"Now look! No powder on the face, no smell of it in the compartment; and yet the pistol found in his hand is an ordinary American-made thirty-eight calibre revolver. We have an amateur a.s.sa.s.sin to deal with, Mr. Narkom, not a hardened criminal; and the witlessness of the fellow is enough to bring the case to an end before this night is over. Why didn't he discharge that revolver to-day, and have enough sense to bring a thimbleful of powder to burn in this compartment after the work was done? One knows in an instant that the weapon used was an air-pistol, and that the fellow's only thought was how to do the thing without sound, not how to do it with sense. I don't suppose that there are three places in all London that stock air-pistols, and I don't suppose that they sell so many as two in a whole year's time. But if one has been sold or repaired at any of the shops in the past six months--well, Dollops will know that in less than no time. I 'phoned him to make inquiries. His task's an easy one, and I've no doubt he will bring back the word I want in short order. And now, Mr. Narkom, as our friend the a.s.sa.s.sin is such a blundering, short-sighted individual, it's just possible that, forgetting so many other important things, he may have neglected to search the body of his victim. Let us do it for him."

As he spoke he bent over the dead man and commenced to search the clothing. He slid his hand into the inner pocket of the creaseless morning coat and drew out a note-book and two or three letters. All were addressed in the handwriting of women, but only one seemed to possess any interest for Cleek. It was written on pink notepaper, enclosed in a pink envelope, and was postmarked "Croydon, December 9, 2.30 P.M.," and bore those outward marks which betokened its delivery, not in course of post, but by express messenger. One instant after Cleek had looked at it he knew he need seek no further for the information he desired. It read:

Piggy! Stupid boy! The ball of the dress fancy is not for to-morrow, but to-night. I have make sudden discoverment. Come quick, by the train that shall leave London Bridge at the time of twenty-eight minute after the hour of five. You shall not fail of this, or it shall make much difficulties for me, as I come to meet it on arrival. Do not bother of the costume; I will have one ready for you. I have one large joke of the somebody else that is coming, which will make you scream of the laughter. Burn this--FIFI.

And at the bottom of the sheet:

Do burn this. I have hurt the hand, and must use the writing of my maid; and I do not want you to treasure that.

"There's the explanation, Mr. Narkom," said Cleek as he held the letter out. "That's why he came by this particular train. There's the snare.

That's how he was lured."

"By Fifi!" said Narkom. "By Jove! I rather fancied from the first that we should find that she or her husband had something to do with it."

"Did you?" said Cleek with a smile. "I didn't, then; and I don't even yet!"

Narkom opened his lips to make some comment upon this, but closed them suddenly and said nothing. For at that moment one of the constables put in an appearance with news that, "Two ladies and two gentlemen have arrived, sir, and are asking permission to view the body for purposes of identification. Here are the names, sir, on this slip of paper."

"Lady Stavornell; Colonel Murchison; Hon. Mrs. Brinkworth; Captain James Crawford," Narkom read aloud; then looked up inquiringly at Cleek.

"Yes," he said. "Let them come. And--Mr. Narkom?"

"Yes?"

"Do you happen to know where they come from?"

"Yes. I learned that when I sent word of Stavornell's death to them this evening. Lady Stavornell and her father have for the past week been stopping at Cleethorp Hydro, to which they went for the purpose of remaining over the Christmas holidays; and, oddly enough, both Mrs.

Brinkworth and Captain Crawford turned up at the same place for the same purpose the day before yesterday. It can't be very pleasant for them, I should imagine, for I believe the two ladies are not very friendly."

"Naturally not," said Cleek, half abstractedly. "The one loathing the man, the other loving him. I want to see those two ladies; and I particularly want to see those two men. After that----" Here his voice dropped off. Then he stood looking up at the shattered globe, and rubbing his chin between his thumb and forefinger and wrinkling up his brows after the manner of a man who is trying to solve a problem in mental arithmetic. And Narkom, unwise in that direction for once, chose to interrupt his thoughts, for no greater reason than that he had thrice heard him mutter, "Suction--displacement--resistance."

"Working out a problem, old chap?" he ventured. "Can I help you? I used to be rather good at that sort of thing."

"Were you?" said Cleek, a trifle testily. "Then tell me something.

Combating a suction power of about two pounds to the square inch, how much wind does it take to make a cutting-table fly, with an unknown weight upon it, from the Sydenham switch to the Low Level station? When you've worked that out, you've got the murderer. And when you do get him he won't be any man you ever saw or ever heard of in all the days of your life! But he will be light enough to hop like a bird, heavy enough to pull up a wire rope with about three hundred pounds on the end of it, and there will be two holes of about an inch in diameter and a foot apart in one end of the table that flew."

"My dear chap!" began Narkom in tones of blank bewilderment, then stopped suddenly and screwed round on his heel. For a familiar voice had sung out suddenly a yard or two distant: "Ah! keep yer 'air on! Don't get to thinkin' you're Niagara Falls jist because yer got water on the brain!" And there, struggling in the grip of a constable, who had laid strong hands upon him, stood Dollops with a kit-bag in one hand and a half-devoured bath bun in the other.

"All right there, constable; let the boy pa.s.s. He's one of us!" rapped out Cleek; and in an instant the detaining hand fell, and Dollops' chest went out like a pouter pigeon's.

"Catch on to that, Suburbs?" said he, giving the constable a look of blighting scorn; and, swaggering by like a mighty conqueror, joined Cleek at the compartment door. "Nailed it at the second rap, guv'ner,"

he said in an undertone. "Fell down on Gamage's, picked myself up on Loader, Tottenham Court Road; 14127 A, manufactured Stockholm. Valve tightened--old customer--day before yesterday in the afternoon."

"Good boy! good boy!" said Cleek, patting him approvingly. "Keep your tongue between your teeth. Scuttle off, and find out where there's a garage, and then wait outside the station till I come."

"Right you are, sir," responded Dollops, bolting the remainder of the bun. Then he ducked down and slipped away. And Cleek, stepping back into the shadow, where his features might not be too clearly seen until he was ready that they should be, stood and narrowly watched the small procession which was being piloted to the scene of the tragedy. A moment later the four persons already announced pa.s.sed under Cleek's watchful eye, and stood in the dead man's presence. Lady Stavornell, tall, graceful, beautiful, looking as one might look whose lifelong martyrdom had come at last to a glorious end; Captain Crawford, bronzed, agitated, a trifle nervous, short of stature, slight of build, with a rather cynical mouth and a small dark moustache; the Hon. Mrs. Brinkworth, a timid, dove-eyed, little wisp of a woman, with a clinging, pathetic, almost childish manner, her soft eyes red with grief, her mobile mouth a-quiver with pain, the marks of tears on her lovely little face; and, last of all, Colonel Murchison, heavy, bull-necked, ponderous of body, and purple of visage a living, breathing monument of Self.

"Hum-m-m!" muttered Cleek to himself, as this unattractive person pa.s.sed by. "Not he--not by his hand. He never struck the blow--too cowardly, too careful. And yet---- Poor little woman! poor little woman!" And his sympathetic eyes went past the others--past Mrs. Brinkworth, sobbing and wringing her hands and calling piteously on the dead to speak--and dwelt long and tenderly upon Lady Stavornell.

A moment he stood there silent, watching, listening, making neither movement nor sound; then of a sudden he put forth his hand and tapped Narkom's arm.

"Detain this party, every member of it, by any means, on any pretext, for another forty-five minutes," he whispered. "I said the a.s.sa.s.sin was a fool; I said the blunders made it possible for the case to be concluded to-night, did I not? Wait for me. In three-quarters of an hour the murderer will be here on this spot with me!" Then he screwed round on his heel, and before Narkom could speak was gone, soundlessly and completely gone, just as he used to go in his Vanishing Cracksman's days, leaving just that promise behind him.

III

It wanted but thirteen minutes of being midnight when the gathering about the siding where the shunted carriage containing the body of the murdered man still stood received something in the nature of a shock when, on glancing round as a sharp whistle shrilled a warning note, they saw an engine, attached to one solitary carriage, backing along the metals and bearing down upon them.

"I say, Mr. Knockem, or Narkhim, or whatever your name is," blurted out Colonel Murchison, as he hastily caught the Hon. Mrs. Brinkworth by the arm and whisked her back from the metals, leaving his daughter to be looked after by Captain Crawford, "look out for your blessed bobbies.

Somebody's shunting another coach in on top of us; and if the a.s.s doesn't look what he's doing----There! I told you!" as the coach in question settled with a slight jar against that containing the body of Lord Stavornell. "Of all the blundering, pig-headed fools! Might have killed some of us. What next, I wonder?"