He went out on the drive. Here were plenty of marks, but try as he would he could make nothing of them. The surface was covered thickly with fine gravel and only showed vague disturbances with no clear outlines. He began methodically to search the drive as he had done the yard. Every foot was examined in turn, Burnley gradually working down towards the gate. After he left the immediate neighbourhood of the house the gravel became much thinner, but the surface below was hard and bore no marks. He continued perseveringly until he got near the gate, and then he had some luck. In the lawn between the house and the road some work was in progress. It seemed to Burnley that a tennis or croquet ground was being made. From the corner of this ground a recently filled in cut ran across the drive and out to the hedge adjoining the lane. Evidently a drain had just been laid. [Illustration: Footprint] Where this drain passed under the drive the newly filled ground had slightly sunk. The hollow had been made up in the middle with gravel, but it happened that a small space on the lane side which had not gone down much was almost uncovered, the clay showing through. On this space were two clearly defined footmarks, pointing in the direction of the house. I have said two, but that is not strictly correct. One, that of a workman’s right boot with heavy hobnails, was complete in every detail, the clay holding the impression like plaster of Paris. The other, some distance in front and to the left and apparently the next step forward, was on the edge of the clay patch and showed the heel only, the sole having borne on the hard. Inspector Burnley’s eyes brightened. Never had he seen better impressions. Here was something tangible at last. He bent down to examine them more closely, then suddenly sprang to his feet with a gesture of annoyance. ‘Fool that I am,’ he growled, ‘that’s only Watty bringing up the cask.’ All the same he made a careful sketch of the marks, showing the distance between them and the size of the clay patch. Watty, he felt sure, would be easy to find through the carting establishment, when he could ascertain if the footsteps were his. If it should chance they were not, he had probably found a useful clue to the thief. For the convenience of the reader I reproduce the sketch. Burnley turned to go on, but his habit of thinking things out reasserted itself, and he stood gazing at the marks and slowly pondering. He was puzzled that the steps were so close together. He took out his rule and re-measured the distance between them. Nineteen inches from heel to heel. That was surely very close. A man of Watty’s size would normally take a step of at least thirty inches, and carters were generally long-stepping men. If he had put it at thirty-two or thirty-three inches he would probably be nearer the thing. Why, then, this short step? He looked and pondered. Then suddenly a new excitement came into his eyes and he bent swiftly down again.