"You spoke a moment ago of dislodging them," remarked Radley-Todd. "Can't we manage to do that, Steve?"
"How?"
"If we could make some bombs," suggested the press-agent, slowly, "and hurl them among those rocks, I've an idea we could drive them away."
Steve was thoughtful a moment.
"We'd need nitro-glycerine for that," said he. "I suppose there's none aboard, Captain Krell?"
The captain shook his head.
"Plenty nitro-glycerine at big islan'," announced Pietro. "Ramon use it to blast rock."
"Ah, but that's a good way off," declared Steve.
Chesty drummed on the table, musingly.
"If Pietro will go with me," he said presently, "I'll get you the nitro-glycerine."