"Nor I," said Walton, the fellow in charge of the ammunition room.
"Well, I'm going out again," said Oscar. "But this time I shall go armed with a rifle as well as with the dynamite."
The new Holland boasted of several electric rifles, which could readily be discharged under water.
"I'll go along in place of Andy, if you'll have me," said old George Dross.
"All right," said Oscar.
The pair were soon outside, each with a rifle and each carrying a dynamite bomb.
They made a thorough examination of the cave and during that time nothing but a few curious, but harmless, fish came to disturb them.
At one point they discovered a small opening through which came a faint light.
Some small rocks were in the way and these pulled aside they saw that only one large stone lay between them and the outside ocean.
Oscar pointed to the rock and to his dynamite shell and George Dross nodded, to show that he understood.