His first care was to make a thorough search in the yard and all the out-houses to ensure that the cask was really gone and not merely hidden in some other room. He was speedily satisfied on this point. Since it was gone it was obvious that it must have been removed on a vehicle. His next point was to see how that vehicle got in, and if it had left any traces. And first as to the coach-house door. He picked up the padlock and examined it carefully. It was an ordinary old-fashioned four-inch one. The ring had been forced open while locked, the hole in the opening end through which the bolt passes being torn away. Marks showed that this had been done by inserting some kind of lever between the body of the lock and the staple on the door, through which the ring had been passed. The Inspector looked round for the lever, but could not find it. He therefore made a note to search for such a tool, as if it bore marks which would fit those on the door, its evidence might be important. There was next the question of the yard gate. This opened inwards in two halves, and was fastened by a wooden beam hinged through the centre to the edge of one of the half gates. When it was turned vertically the gates were free, but when horizontally it engaged with brackets, one on each half gate, thus holding them closed. It could be fastened by a padlock, but none was fitted. The gate now stood closed and with the beam lying in the brackets. The Inspector took another note to find out if Mr. Felix had locked the beam, and then stood considering. It was clear the gate must have been closed from the inside after the vehicle had gone out. It must have been opened similarly on the latter’s arrival. Who had done this? Was Felix lying, and was there some one else in the house? At first it seemed likely, and then the Inspector thought of another way. Constable Walker had climbed the wall. Why should not the person who opened and shut the gate have also done so? The Inspector moved slowly along the wall scrutinising it and the ground alongside it. At first he saw nothing out of the common, but on retracing his steps he noticed, about three yards from the gate, two faint marks of mud or dust on the plaster. These were some six feet from the ground and about fifteen inches apart. On the soft soil which had filled in between the cobble stones in this disused part of the yard, about a foot from the wall and immediately under these marks, were two sharp-edged depressions, about two inches long by half an inch wide, arranged with their longer dimensions in line. Some one had clearly used a short ladder. Inspector Burnley stood gazing at the marks. It struck him they were very far apart for a ladder. He measured the distance between them and found it was fifteen inches. Ladders, he knew, are about twelve.