Nick obeyed without replying.

He felt his way from the car, and then the hand of the driver gripped his other arm. He felt the crunch of gravel under his feet, then the stone step of a doorway.

The tread of all three then fell upon bare planking, and Nick could sense that they had entered a building and were in a corridor of considerable size, which he determined from the sound of their footsteps on the floor.

Nick had taken only a few steps, however, when he felt the two men thrust him through another doorway. Their hands left his arms. He heard the crash of a closed door behind him—and then found himself alone and in sudden silence.

“What’s the meaning of this?” he asked himself, recalling what Garland had told him of his own experiences. “This isn’t quite in line with what he stated. Have these rascals——”

Nick held his breath for an instant.

The floor on which he stood was descending.

“An elevator!” flashed through his mind. “Garland mentioned an elevator, and that he was taken down to the room in which he met Margate. This must be the same place.”

The descending floor stopped in a few seconds, so gently that Nick rightly inferred that electricity was the motive power. He reached out in each direction and could touch only—four bare walls.

“By Jove, I’ll find out what kind of a box I’m in,” he said to himself abruptly. “I’ll not wait for these rats to show me.”