Who was the man who guarded Michael's invention?
Was he awake or was he asleep?
I felt if my knife were ready, and trod water; as I did so, I found bottom under my feet.

The foundations of the Castle extended some fifteen inches, making a ledge; and I stood on it, out of water from my armpits upwards.

Then I crouched and peered through the darkness under the pipe, where, curving, it left a space.
There was a man in the boat.

A rifle lay by him--I saw the gleam of the barrel.

Here was the sentinel! He sat very still.