"We must remember, Roger," whispered Harry, "that we shall have to listen very carefully for footsteps coming along that passage, and hide these tools somewhere at the first sound. Of course, if we were seen working here, or if the tools were discovered, we might just as well give up at once, for there would be no hope left." "You are right, my friend," answered Roger. "But I do not intend that anybody shall catch us at this work; nor shall they catch sight of the tools. At the first sound of any person approaching you must jump down for your life, remove the stools, and sit down and pretend to be asleep. I will wrap the tools up quickly in their bag, and slip them into my jerkin. If we are summoned from the cell, and are likely to be searched, I shall endeavour, as we go, to drop the parcel behind the door, where it cannot be seen unless someone enters the cell and deliberately looks behind the door, which is not very likely unless they suspect us of having got hold of any tools. Now remember what I say. No more talk now, Harry; we shall require all our breath for working." They slaved away with file and saw, never ceasing work for a moment, until their muscles utterly refused to allow their tired arms to make another movement, and then they rested for a moment to recover. Harry and Roger each worked on a separate bar of the grating, and so equal had been their efforts that each lad's bar was cut through at the same time. "There go two nails drawn from our coffins, Roger," said Harry, and he attacked his second bar with the energy born of deserved success. Roger uttered no word, but saved all his breath, and put every ounce of his strength into his arms, cutting away with file and saw like a very madman.