The Saint looked long and hard at that box, and suddenly he had an inspiration. Bending down, he felt along the ground by the door. Presently he found wires, and a little research disclosed the fact that they ran up the corridor—towards the table and the square box. A little more investigation brought him to the metal contacts which closed the electric circuit. One of them he found screwed to the inside of the door, low down; the other projected from a terminal fixed to the floor. On the strength of that, Simon began to tiptoe down the passage, though he did not relax his vigilance for an instant. He came to the table and the box, and examined them with interest. The wires he had found led to terminals on the box, and from the front of it protruded a shining steel tube. “Very ingenious, my Tiger,” was the Saint’s unspoken comment. “When I open the door, I get pipped. And I didn’t, after all. _So_ sorry!” However, just in case the arrangement had any more shots left, and in case he should have to leave hurriedly by the door, he slewed the box round so that the gun barrel pointed into the wall, and disconnected the wires. Then he took stock of the position again. The discovery and circumnavigation of that little booby-trap didn’t dispose of the possibility of encountering others—in fact, his estimate of the Tiger forced him to realise that the next step he took might set some other equally neat little contrivance working. And if not that, there might still be Tiger Cubs in the building, already warned of his arrival by Booby Trap Number One going off, and knowing that it hadn’t functioned quite according to plan. The amusing thought that they might be in some fear of his fighting record struck the Saint, and he chuckled quietly. Perhaps they felt confident of having him safely trapped, and were just biding their time to strike him down when the operation could be performed without risk to themselves. Well, it wouldn’t hurt them to keep on hoping. But the job looked just as prickly now that he was inside the Old House as it had been when he was outside. However gingerly he opened the next door, there might be men inside the room waiting to open fire as soon as he showed up in the doorway. Yet the Saint was no piker; and, having got so far, he intended to go the rest of the journey. And the only course he could see was to repeat the tactics he had used when entering the building in the first place. So, without further hesitation, he got on with it.