you have to bring the man down yet, and see that the boy is taken to his
place. Now, up with it."

Standing there, holding on to the rope and quivering with excitement,
Gurdon wondered what was going to happen next. Once more he felt himself
rising, and an instant later he was in the light again. He waited till
the lift had reached his own floor; then he jumped quickly down, taking
care as he went to note the heavy box which lay on the floor of the lift.
A corner of it had been split open by the heavy jar, and some shining
material like sand lay in a little heap, glittering in the rays of the
electric light.

Gurdon stood there panting for a moment, and rather at a loss to know
what to do next. Once more the lift came down, this time with two boxes
of a smaller size. They vanished; and as the lift rose once again, Gurdon
had barely time to hide himself behind the bedroom door, and thus escape
the observation of two men who now occupied the cage. He just caught a
fleeting glimpse of them, and saw that one was an absolute stranger, but
he felt his heart beating slightly faster as he recognised in the other
the now familiar form of Mark Fenwick. The mystery was beginning to
unfold itself.

"That was a close thing," Gurdon muttered, as he wiped his hot face. "I
think I had better go back to my own room, and wait developments. One
can't be too careful."

The lift-boy was still sleeping on the bed; but his features were
twitching, as if already the drug was beginning to lose its effect. At
least, so Gurdon shrewdly thought, and subsequent events proved that he
was not far wrong. He was standing in his own room now, waiting by the