I'll carry the other." With no words, and no apparent effort, the old man picked up both bags and shuffled off.

The professor followed.

At the end of the wharf there were steps and beneath the steps a small floating platform to which was secured what the professor afterwards described as "a marine vehicle, classification unknown." Someone, girl or woman, hidden in a loose, green coat, was already seated there.

A pair of dark eyes looked up impatiently.
"I am afraid you were not expecting me," said the professor.

"I am Hamilton Spence.