Foyle felt that it was going to be no easy matter to win this man's confidence. Yet he was determined to do so. Beyond the fact that he had vanished when the murder was discovered, there was nothing so far to suggest that he was the actual culprit. Certain it was, however, that he must have knowledge of matters which would prove valuable. If he would volunteer the information, well and good. The detective did not wish to have to question him, for such a course, however advisable it might appear, could be made to a.s.sume an ugly look in the hands of the astute counsel, should the man be charged with the crime. Where by French or American methods a statement might have been extracted by bullying or by cross-examination, here it had to be extracted by diplomacy if possible.

Sullen and silent, Ivan alighted from the cab as it drew up under the blue lamp outside King Street police station. He pa.s.sed arm-in-arm with Foyle up the steps. With a nod to the uniformed inspector in the outer office, the superintendent led him into the offices set apart for the divisional detachment of the Criminal Investigation Department. A broad-shouldered man with side whiskers, who was writing at a desk, looked up as they entered.

"Good morning, Mr. Norman," said Foyle. "This gentleman wants to tell me something about the Grell case. Just give him a chair, will you, and send in a shorthand writer who understands French to take a statement."

"I shall make no statement," broke in the Russian angrily, speaking in French, but with a readiness that showed he was able to follow English.

"It's all a mistake--a mistake for which you will pay heavily."

"Ah! that's just what I wish to get at. There seems to be a little confusion. Perhaps I have been over-zealous, but the fact is, Monsieur--er--Bazarre, you are wearing a false moustache, and that rather aroused my suspicions--see?"

His hand did not seem to move, yet a second later the heavy moustache had been torn from the man's face. He started to his feet with an exclamation. Foyle waved him back to his chair.

"I only wanted to feel sure that I was right. Now, monsieur, I want to make it clear that I have no right to ask you anything. If you wish to say anything, it will be taken down, and what action I take depends on what you say."

Ivan scowled into the fire and preserved a stubborn silence. Whether he knew it or not, he held all the advantage. Unless he committed himself by some incautious word, there was little to implicate him in the murder. Suspicion there might be, but legal proof there was none. It would scarcely do to arrest him on such flimsy evidence. The Russian police had failed to trace his antecedents, and the Criminal Investigation Department were ignorant even of his surname. He had been known simply as Ivan at Grosvenor Gardens.

Foyle tried again, and this time his voice was silky and soft as ever as he uttered a plainer threat.

"I want to help you if I can. I don't want to have to charge you with the murder of Mr. Grell."

The warm blood surged crimson to Ivan's face. In an instant he was out of his chair and had leapt at the throat of the detective. So rapid, so unexpected was the movement that, although Heldon Foyle had not ceased his careful watchfulness, and although he writhed quickly aside, he was borne back by his a.s.sailant. The two crashed heavily to the floor. As they rolled over, struggling desperately, the grip upon the detective's throat grew ever tighter and tighter.

Half a dozen men had rushed into the room at the noise of the struggle, and strove vainly to tear the Russian from his hold. But he hung on with the tenacity of a mastiff. There was a ringing in Foyle's ear and a red blur before his eyes. With a superhuman effort he got his elbow under the Russian's chin and pressed it back sharply.

The grip relaxed ever so slightly, but it was enough. Instantly Foyle had wrested himself free, and Ivan was pinioned to the floor by the others.

"Handcuffs," said the superintendent sharply.

Some one got a pair on the prisoner's wrists, and he was jerked none too gently to his feet. A couple of men still held him. At a word from Foyle the others had gone about their business, with the exception of Norman.

The superintendent flicked the dust from his clothes, and picked something, which had fallen during the struggle, from the floor.

"You admit you are Ivan, then?" he said quietly.

The Russian showed his teeth in a beast-like snarl.

"Yes, I am Ivan," he said. "Make what you can of that, but you cannot have me hanged for the murder of Mr. Grell--_and you know why_."

"Because Mr. Grell is not dead," retorted the detective smoothly. "Yes, I know that."

He counted the rough-and-tumble but little against the fact that the Russian had now admitted that he knew it was not Grell's body that had been found in the study. Here was a starting-point at last.

"What I want now," he went on slowly, "is an explanation of how you came to have possession of these."

He held up the thing he had picked from the floor. It was a case of blue Morocco leather, and as he opened it a magnificent string of pearls showed startlingly white against a dark background.

"These pearls were bought at Streeters' by Mr. Grell as a wedding present to Lady Eileen Meredith," he said. "How do they come in your possession?"

"They were given to me by Mr. Grell," cried Ivan. The fierce pa.s.sion that had made him attack Foyle on the hint of arrest seemed to have melted away.

Heldon Foyle's mask of a face showed no sign of the incredulity he felt.

He made no comment, but ran his hands swiftly through the Russian's pockets, piling money, keys, watch, and other articles in a little heap on the table. Beyond a single letter there were no doc.u.ments on the man.

He scanned the missive quickly. It was an ordinary commonplace note from a jeweller in Paris, addressed to Ivan Abramovitch. This he placed aside.

"May as well have his finger-prints," he said, and one of the officers present pressed Ivan's hands on a piece of inky tin, and then on a piece of paper. The superintendent glanced casually at the impression.

"All right," he said. "Take those handcuffs off. You may go, Mr.

Abramovitch."

The Russian stood motionless, as though not understanding. Foyle wheeled about as though the whole matter had been dismissed from his mind, and caught Norman by the sleeve.

"Drop everything," he said in a curt whisper. "Take a couple of men and don't let that man out of your sight for an instant. I'll have you relieved from the Yard in an hour's time."

"Aren't you going to charge him, sir?" asked the other in astonishment.

"Not likely," said Foyle, with a laugh.

CHAPTER XII

Heldon Foyle walked thoughtfully back to Scotland Yard, satisfied that the shadowing of Ivan Abramovitch was in competent hands. With the strong man's confidence in himself, he had no fears as to his decision to release the man. He was beginning to have a shadowy idea of the relation of pieces in his jig-saw puzzle. Ivan, he knew, ought to have been arrested if only for failing to give a satisfactory account of his possession of the pearl necklace. But the superintendent had, as he mentally phrased it, "tied a string to him," and it would not be his fault if nothing resulted.

It was well after midnight before he had finished his work at Scotland Yard. He had had a long interview with the Garden of Eden, in which promises were adroitly mingled with threats. In the result the "bunco-steerer" had promised to keep his eyes and ears alert for news of any one resembling Goldenburg. There was a string of other callers who had been discreetly sorted out by the superintendent's diplomatic lieutenants. Finally, he pulled out the book which dealt with the case, and with the aid of a typist added several more chapters. With a sigh of relief, he at last sauntered out into the cool, fresh midnight air.

Nine o'clock next morning saw him again in his office. Sir Hilary Thornton was his first caller. Foyle put aside his reports at his chief's opening question.

"Yes, we've taken every human precaution to preserve secrecy," he replied. "Every one who knows that it is not Grell's body in the house has been pledged to hold his tongue. I have managed to get the inquest put back for three days, so that there will be no evidence of identification till then. That gives us a chance. And I've made out a confidential report to be sent to the Foreign Office, so that Grell's Government shan't get restive. Here are the latest reports, sir."

The a.s.sistant Commissioner bent over the sheaf of typewritten doc.u.ments for a little in complete absorption. As he came to the last sheet he gave a start of surprise.

"So you let this man Ivan go? Do you think that wise?"

"I'm fishing," answered Foyle enigmatically. "I couldn't have better bait than Ivan. There are three men sticking to him like limpets now, and a couple are keeping an eye on Sir Ralph Fairfield. I think that will be all right. Do you remember the Mighton Grange case? We knew there had been a murder, but couldn't do anything till we found the body. Dutful, the murderer, would have slid off to some place where there's no extradition, but for the fact that I had him arrested on a charge of being in the unlawful possession of a pickaxe handle. This affair is the converse of that. We can't afford to have Ivan under lock and key."

Sir Hilary Thornton bit his lip and looked steadfastly at the scarlet geranium on the window-sill, as though in search of enlightenment.

"I believe I see," he exclaimed after a pause. "Ivan must have been something more than a valet. He's a superior type of man, and the conclusion to be drawn if he knows that Grell is alive----"

"Precisely," interrupted the superintendent.

"Any result from the offer of a reward for Goldenburg?"

A flicker of amus.e.m.e.nt dwelt in Heldon Foyle's blue eyes. "Yes. He has been seen by different people within an hour or two of each other in Glasgow, Southampton, Gloucester, Cherbourg, Plymouth, and Cardiff. Our information on that point is not precisely helpful. Of course, we've got the local police making inquiries in each case, but I don't antic.i.p.ate they will find out much. Still, it will keep 'em amused."

The necessity of a conference broke up further conversation. Gathered in the building were some thirty or forty departmental chiefs of the C.I.D., the picked men of their profession. Most of them were divisional detective inspectors who were in charge of districts, and some few were men who had special duties. They were ranged about tables in a lofty room, its green distempered walls hung with stiff photographs of living and retired officials. Men of all types were there, from the spruce, smartly groomed detectives of the West End to the burly, ill-dressed detectives of the East. Between them they spoke every known language.

Here was Penny, who had specialised in forgeries; Brown, who knew every trick of coiners; Malby, the terror of race-course sharps; Menzies, who had as keen a scent for the gambling h.e.l.l as a hound for a fox; Poole, who was intimate with the ways of railway thieves and shoplifters. Not one but thoroughly understood his profession, and knew where to look for his information.