Benton Street, he found by the directory, turned out of the City Road south of Old Street, so was quite near. He was there in less than ten minutes, and had discovered Dragon Yard. Dragon Yard was as small a stable-yard as one could easily find. Only the right-hand side was occupied by stables, and there were only three of these. On the left was a high dead wall bounding a great warehouse or some such building. Across the first and second of the stables stretched a long board with the legend, “W. Gask, Corn, Hay, and Straw Dealer,” and underneath a shop address in Old Street. The third stable stood blank and uninscribed, and all three were shut fast. Nobody was in the yard, and Hewitt at once proceeded to examine the end stable. The doors were unusually well finished and close-fitting, and the lock was a good one, of the lever variety, and very difficult to pick. Hewitt examined the front of the building very carefully, and then, after a visit to the entrance of the yard, to guard against early interruption, returned and scrambled by projections and fastenings to the roof. This was a roof in contrast to those of the other stables. They were of tiles, seemed old, and carried nothing in the way of a skylight; evidently it was the habit of Mr. Gask and his helpers to do their horse and van business with gates wide open to admit light. But the roof of this third stable was newer and better made, and carried a good-sized skylight of thick fluted glass. Hewitt took a good look at such few windows as happened to be in sight, and straightaway began, with the strongest blade of his pocket-knife, to cut away the putty from round one pane. It was a rather long job, for the putty had hardened thoroughly in the sun, but it was accomplished at length, and Hewitt, with a final glance at the windows in view, prised up the pane from the end and lifted it out.