Page:Air Service Boys Flying for France.djvu/100

Rh It sinks to a certain depth and then explodes. In many cases they prove effectual, and nothing is ever seen of the sub again, while great quantities of oil and grease come up to tell what happened far below."

"Well, the many things that have been invented to take human life since this war started are wonderful—and terrible—" sighed the woman.

"As the afternoon wore away the excitement abated, and at four o'clock word was passed around that two British destroyers were in sight, coming out to convoy them through the approaching period of darkness.

"Now we'll have some protection for the rest of the trip," remarked Tom.

"And I'm glad of it," returned Jack quickly.