For a long time nobody felt anything of importance, but at last Sam let out a soft cry:
"I've found something of a door!"
"Good for you," answered Tom. "Can you open it?"
"No, there seems to be a bar or something on the other side."
The others rejoined the youngest Rover, and made out the door quite plainly, for there was a broad crack at the top and at the side opposite the hinges. There was a bar, true enough.
"If we had something that we could slip into that crack, we might move the bar," observed Dick.
"I slipped on a sheet of tin a while ago," said Tom. "Perhaps I can find that."
His hunt was successful, and soon they had the tin in the crack under the bar. The latter gave way with ease, and then they pulled the door open. Beyond was the passageway leading to the cabin.
"Now what's the next movement?" whispered Sam.
"Let us try to arm ourselves first of all," answered Dick. "Then, if we are cornered again, we may be able to make some kind of favorable terms."