“Hand it here,” cried Rayner; and heat once began filing away.
In the meantime Brown managed to get hold of one of the upper stones of the wall. It was hard, and had a sharp side.
“Here it is, sir,” he said, clambering down and bringing it to Rayner. A few blows on the bench served to sever the link already partly filed through.
“Oh! set us free, monsieur?” cried the other prisoners.
“What does he say?” asked Brown.
“There won’t be time to set you both free, but I’ll see what I can do for one of you;” and he began filing away, and with the help of the stone he managed to liberate the arm of one of the men.
“Here, take the file and see what you can do for your comrade,” he said.
The rest of the party had in the meantime begun to mount the wall.