"For your first line to lower down to me, unravel your hose or under-jerkin, or any garment you can spare without it being noticed. This will give you a long, thin line, to the end of which you must secure a light weight to prevent it from blowing about. Now, until to-night, farewell! I shall be there at midnight exactly, and you must be quite ready. Make no mistake, for this is your only chance, and any mistake will mean the loss of my life as well as your own." This ended the letter, and Roger immediately took it from Harry's hand, and concealed it, with the first missive, in the lining of his jerkin. "Now, Harry," said he, "we must act at once; for, as the fellow says, there is no time to lose, and it will take us all the time we have left before darkness sets in to unravel a garment to form our line. He will send us up several files, he says in the letter. Now, if we can put those two stools one on top of the other we shall both be able to stand on them and work together; which is a fortunate thing, as it will take us a long time to cut those bars, so thick are they. I hope the noise will not be heard through the walls, and draw the attention of our jailers; but we must be as silent as we can, and risk the rest. I am more glad than ever now that we closed up that spy-hole, for, had we not done so, we should certainly have been discovered already. Now, Harry, we had best begin on this under-jerkin of mine; the absence of that will not be noticed if I keep my doublet buttoned well up and over. You begin at one end and I will start at the other corner, so that, if we are pressed for time, we can break the threads off and join yours and mine together, and have twice the length we should get otherwise." Roger stripped his jerkin off, replaced his doublet, and both set to work. By this time the daylight had nearly gone, but, as fortune would have it, a full moon rode high in the sky, and one shaft of light filtered in through the barred window. The court below, however, was in darkness, as the walls were so high that the moonbeams never struck lower than about half-way down them. In this small patch of light, then, the two lads worked for their lives. When they began their task they considered that about three hours would suffice to complete the work. As time passed, however, it seemed to them as though their fingers were made of lead, so slow did they appear to move, to the lads' excited imagination. Yard by yard the silk became unravelled, and was rolled carefully round Roger's finger, so that, when the time came, there might be no hitch in paying it out.