They dare not do such a thing as that.

Come." They retired, making for the mouth of the cavern, where the cool night air blew with refreshing force.
"But we cannot give up, father," cried Mark.
"I am not going to give up, my boy," said Sir Edward quietly.

"When an assault upon a stronghold fails, a general tries to starve his enemy into submission.

We must do the same here.

Unfortunately they must have stores, and they have a good supply of water from a spring within there.