"Let's give another yell, bigger than before," suggested Dan weakly.
They did, but with no better result than before.
"The launches are away now, anyway, I guess," groaned Farley, after consulting his watch.
"Yes, and we're up the tree with the commandant," grunted Dalzell bitterly.
"Yell again?" asked Farley.
"No," retorted Dave, shaking his head. "We've seen the uselessness of asking help from outside. Let's supply our own help. Now, then—altogether! Shoulder the door!"
A savage assault they hurled upon the door. But they merely caused it to vibrate.
"We can't do it," gasped Dan, after the third trial.
Considerable daylight filtered in through the cracks at top, bottom and one side of the door. Further back in the shed there was less light.
"Let's explore this old place in search of hope," begged Dave.