Again the screws were set in motion. The submarine boat strained and quivered, as if to pull in twain every bolt that held her together. But move from her resting place she did not.
They were prisoners at the bottom of the ocean.
CHAPTER VI.
OUT OF A LIVING TOMB.
Everybody on board looked to the young captain regarding what move was to be attempted next.
"We are stuck," muttered Andy Greggs.
"We must get out," returned Captain Oscar. He turned to one of the men. "How much air in the reservoir, Marney?"
"Two hundred and fifteen feet, captain."
"Humph! Enough for two hours."
"And after that?" put in Andy Greggs.