Then in turn I took out my note book and took the numbers of the policemen. The crowd had listened with great interest, and were evidently against the policemen. A boy looked under a policeman's arm and grinned; I winked at him covertly, and he went into a paroxysm of laughter. Then with dignity I got into the car and we drove off to the bank, leaving behind the discomfited policemen and a crowd of several hundred people. "Where did the cop get hold of you, Rad?" I enquired. "Over on Bond Street," he said, "he insisted on my going to the police station with him. "All right," I said, "jump in," and he did so. I knew where the police station was in a street off Oxford Street, but when we got to the street I passed it. The officer called out, but I didn't hear him. At the next corner he yelled again, but I got in front of a convenient bus." "Why didn't you turn there," he said. "Then you would have had a real charge against me," I said, "for breaking the rules of traffic." Finally he asked "Are you going to turn or not?" and I said "I guess we will turn here" and turned around, stopping in front of the Marguereta Restaurant. "What are you stopping for?" he asked. "The officers who are in charge of the car are in there at their dinner," I said, "you had better speak to them." Gee, he was mad." All the rest of the afternoon I chuckled with delight at the picture of the anger of that cub six foot two policeman as he was being whirled along Oxford Street against his will, to a restaurant he did not want to go to, to meet people he didn't want to see. CHAPTER V. THE LOST CANADIAN LABORATORY. At the War Office in London, in the autumn of 1914, I met Captain Sydney Rowland of the staff of the Lister Institute. He was a man who had made a reputation in the scientific world and had just been authorized by the British War Office to purchase a huge motor caravan to be equipped as a mobile laboratory. The caravan had been built originally by a wealthy automobile manufacturer at a cost of 5,000 pounds, and had been completely equipped for living in while touring the country. It even had a little kitchen, and the whole affair was lined with aluminium. Tiring of it, the builder had sold it to a bookmaker who used it for less legitimate purposes. Captain Rowland had heard of this machine and finally located and purchased it. All the expensive interior was torn out and replaced with work benches and sinks, while shelves and racks were provided for glassware and apparatus. It was a beautifully equipped, compact machine, and he was justly proud of it.