I dodged unobtrusively through the crowd on the pavement, with my hand on my breast-pocket to see that my paper was still there. There was a little picture-shop near by to which I used to go occasionally, owned by a man who was an adept at cleaning and restoring. I had sent him customers and he was likely to prove a friend. So I dived into his doorway, which made a cool pit of shade after the glaring street, and found him, spectacles on nose, busy examining some dusty prints.
He greeted me cordially and followed me into the back shop.
"Mr. Levison," I said, "have you a back door?"
He looked at me in some surprise. "Why, yes; there is the door into the lane which runs from Edgeley Street into Connaught Mews."
"Will you let me use it? There is a friend outside whom I wish to avoid. Such things happen, you know."
He smiled comprehendingly. "Certainly, sir. Come this way," and he led me through a dark passage hung with dingy Old Masters to a little yard filled with the debris of picture frames. There he unlocked a door in the wall and I found myself in a narrow alley. As I emerged I heard the bell of the shop-door ring. "If any one inquires, you have not seen me here, remember," I said, and Mr. Levison nodded. He was an artist in his small way and liked the scent of a mystery.
I ran down the lane and by various cross streets made my way into Bayswater. I believed that I had thrown my trackers for the moment off the scent, but I had got to get to the Embassy, and that neighbourhood was sure to be closely watched. I came out on the Bayswater Road pretty far west, and resolved to strike south-east across the Park. My reason was that the neighbourhood of Hyde Park Corner was at that time of day certain to be pretty well crowded, and I felt more security in a throng than in the empty streets of Kensington. Now that I come to think of it, it was a rash thing to do, for since Lumley knew the full extent of my knowledge, he was likely to deal more violently with me than with Chapman, and the seclusion of the Park offered him too good a chance.
I crossed the riding-track and struck over the open space where the Sunday demonstrations are held. There was nothing there but nurses and perambulators, children at play, and dogs being exercised. Presently I reached Grosvenor Gate, where on the little green chairs well-dressed people were taking the air. I recognised several acquaintances and stopped for a moment to talk to one of them. Then I emerged in Park Lane and walked down it to Hamilton Place.
So far I thought I had not been followed, but now once more I had the indefinable but unerring sensation of being watched. I caught a man looking eagerly at me from the other side of the street, and it seemed to me that he made a sign to someone farther off. There was now less than a quarter of a mile between me and Belgrave Square, but I saw that it would be a hard course to cover.
Once in Piccadilly there could be no doubt about my watchers. Lumley was doing the thing in style this time. Last night it had only been a trial trip, but now the whole energies of the Power-House were on the job. The place was filled with the usual mid-season crowd, and I had to take off my hat several times. Up in the bow-window of the Bachelors' Club a young friend of mine was writing a letter and sipping a long drink with an air of profound boredom. I would have given much for his ennui, for my life at the moment was painfully exciting. I was alone in that great crowd, isolated and proscribed, and there was no help save in my own wits. If I spoke to a policeman he would think me drunk or mad, and yet I was on the edge of being made the victim of a far subtler crime than fell within the purview of the Metropolitan force.