CHAPTER 12: The Sad Side Of War.
Before firing the keg of powder, Rupert and Hugh had rid themselves of their jackboots, coats, and vests, and they therefore swam easily and confidently.
"Listen, Hugh! Here is the boat coming back again," Rupert exclaimed.

"This thick mist is fortunate, for they can't see twenty yards.

We can always dive when they come near.

Mind you go down without making a splash.

We are all right at present; the boat is going to our right, let us swim quietly in the other direction." Presently they heard a voice in English say, "It is no use our troubling ourselves.