an envelope into his hand.
Foyle watched the incident and his pace quickened. Before Fairfield had time to do more than glance at the inscription of the envelope he was abreast. He lurched inward and his fingers snatched quickly at the note. The next instant he was running with long, even strides for the open of the main road.
It was barefaced robbery, of course, but he had not the inclination to stick at trifles. That the note had some bearing on the case he was investigating he felt certain. There was only one way to get it at once, and that was to steal. Anywhere else but in Grave Street he would have waited to face the matter out. Not that Grave Street would have frowned upon a theft, but that he would have been forced to reveal his identity, and Grave Street was not a healthy neighbourhood for solitary detectives.
Sir Ralph stood thunderstruck, but someone else acted. The black-bearded man had disappeared. From somewhere there were a couple of dull thuds like a hammer falling upon wood, and Foyle heard the whistle of bullets over his head.
‘I’ll get even for that,’ he muttered between his teeth, but his headlong flight never slackened.
Behind him was a clatter of pursuing feet. Fairfield, recovering himself, had raised a cry and it was taken up.
‘Stop thief! Hold him!’
He passed the man who had been so eagerly intent on the bookshop. The man made a clutch at him, missed and fell headlong right in the path of Fairfield, now a few paces behind. The baronet tripped over his body and was thrown violently to the ground.
Foyle made a mental note in favour of Detective-Sergeant Chambers, who had so adroitly intercepted the pursuit. As he came to the main road he slackened his pace to a sharp walk, and dived into an underground station. He breathed a sigh of relief as he passed down the steps to the platform.
He had anticipated trouble, but pistol-shots in broad daylight, even in Grave Street, had been outside his calculations. He had recognised the peculiar report of an automatic pistol. His adversaries, whoever they might be, were obviously very much in earnest. Pistol-shooting at detectives is not a commonplace pastime even with the most reckless of criminals. Foyle decided on another and early visit to Grave Street, and promised himself grimly that the target should be someone else, if it came to shooting again. He was in danger of losing his temper.
Not until he had got in the train did he open the note that was still between his fingers. He frowned as he read it.
‘Curse it! This comes of acting on impulse. Why couldn’t I have waited! I had the whole thing in my hands.’
The note said simply: ‘I am alive. I must see you. Follow the man who gives you this note.—R. G.’
Heldon Foyle had seen much of Robert Grell’s writing during his search of the house in Grosvenor Gardens, and had no doubt that the note was his. His peace of mind was not increased by the reflection that had he waited and continued to shadow Fairfield he might have discovered the whereabouts of the missing diplomat. Now he had merely given notice as plainly as though he had shouted from the housetops that Fairfield was under observation. He had committed a blunder, and he did not forgive blunders easily, especially in himself.
Even a bath and a change into his normal clothing did not restore his equanimity. In his office he found Green, with a strange excitement in his usually stolid face.
‘Hello, Mr Green. What’s wrong?’ he demanded.
The veteran chief detective-inspector pulled at his moustache.
‘I don’t know, sir, yet. You’ve come just in time. Waverley is missing.’
‘Waverley missing! That’s nonsense. He was put on to relieve Norman in shadowing Ivan Abramovitch.’
‘He’s missing,’ repeated the other doggedly. ‘Ivan went into a shop with an entrance in two streets, and the man who was assisting Waverley slipped round to the other side. He waited there an hour, and then went to look for Waverley.’
The superintendent gave a short, contemptuous laugh.
‘Green, I guess you’ve been working too hard lately. You ought to apply for a fortnight’s leave. Can’t you see, Ivan came out and that Waverley never had time to give the tip to his man, but followed him straight away? There ought to have been three men on the job.’
Green drew himself up stiffly. Foyle had not recovered from the irritation caused by his own mistake, otherwise he would not have spoken as he did. Green was not the kind of man to hastily jump to conclusions.
‘A third was not available when Waverley left,’ he said. ‘Here is why I say Waverley is missing. It came by messenger five minutes ago, addressed to you. As senior officer I opened it.’
Foyle took a typewritten sheet of paper from the other’s hand. It read simply:
‘DEAR MR. FOYLE,—You had better call your men off. We have got one of them safe, and hold him as a hostage for our own safety. If your people go on trying to make things unpleasant for us, things will get unpleasant for him. This is not melodrama, but brutal fact.’
There was no signature. Foyle’s square jaw became set and grim. He had no doubt that the unknown writer fully meant the threat. He liked Waverley, yet the thought of the other’s peril did not sway him for a moment. The man had fallen a victim to one of the risks of his profession.
‘Do they expect us to back down?’ asked the superintendent harshly. ‘If Waverley has been fool enough to get himself in a fix, he must take his chance if we can’t get him out. Let’s have a look at this paper.’
He thrust his hand in a drawer, and, flinging a pinch of black powder on the letter, sifted it gingerly to and fro. In a few seconds four finger-prints stared out blackly from the white surface. They were at right angles to the type, and just beneath it. Foyle’s face relaxed in a pleased smile.
‘They’ve given us something that may help us, after all, Green,’ he cried. ‘Look here; these two middle ones are the prints on the dagger. Now let’s see if we can learn anything from the typing.’
Half an hour later three men stood in a tiny room, darkened, save for a vivid patch of white on a screen a yard and a half square. Foyle and Green watched the screen intently as the third man inserted the slide in the powerful magic lantern. Magnified enormously, the typewritten characters stood out vividly black against the white.
‘What do you make of it, Green?’ asked the superintendent after a pause.
‘Remington machine, latest pattern,’ answered the other briefly. ‘The letter “b” slightly battered, and the “o” out of alignment. Used by a beginner. There is double spacing between some of the lines and single in others. A capital “W” has been superimposed on a small one.’
‘That’s so,’ agreed his superior thoughtfully. ‘You might see if the Remington people can give us any help with that. If possible, get a list of all the people who have bought machines during this last six weeks. It’s a long shot, but long shots sometimes come off. And if you come into my room I’ll give you a pistol. It’ll be as well for you to carry one while you’re on this case. I was shot at myself, today.’
‘Thank you, sir, I think I’ll do without one,’ said the other quietly. ‘My two fists are good enough for me.’
‘As
