Across the smooth waters of the English Channel a motor-boat moved
swiftly. In the bows the Foreign Secretary and the detective gazed
earnestly forward.
Presently the latter clutched Carmichael's arm with an oath. Another
boat had come into view, and they perceived that a diver in full costume
was climbing into it.
The motor-boat came to a stop alongside the other. It could be seen that
the diver held in his hand a ball of paper.