"They would have to get 'em out of the way somehow."

"Then Malone and all the tug's crew are..."

There was an expressive silence.

After a while Caradoc whispered, "Well, shall we try to get aboard?"

"Wouldn't do any good."

"It won't do any good to stay here."

"No, we can't hide on the tug always, and we can't run her engines. You don't know anything about marine engines, do you, Caradoc?"

"Very little. I couldn't run one."

For several minutes, the two adventurers sat in silence, watching the small erect figure of the guard pace and repace his short path. Presently Madden said:

"I've thought of one chance, Caradoc, to escape being starved or murdered."