"We shall be drowned!" cried Dave.
"It looks like it," gasped Bob. "Heaven save us!"
Soon the water was up to their necks and still the stuff under them continued to sink.
Were they to be drowned like rats in a trap?
CHAPTER IX
A PRISONER UNDERGROUND
"What's to do now?"
The question came from Bob Vilett.
The sinking of the brushwood had ceased, and he and Dave found themselves in water almost up to their chins, in absolute darkness.
"I'm sure I don't know, Bob," was the young diver's response. "We are in a tight box, and no mistake."