“I should think that it must,” Paolo agreed.  “I should never have thought of that.”

“We will try it on this last division wall.  I have no doubt about it myself, because even if it did not pull it quite to the top the thing would be so canted over that I think it would fall from its own weight.”

They now attached the string to the point, fixed the hook to the top of the wall, and then pulled upon the string.  The hook at once fell to their feet.

“That is capital,” Hector said.  “Now we can go to work.  We need carry this crowbar no farther.  In the first place we will cross this roof and other roofs as far as we can go; the sentry at the corner is probably standing up for shelter in a doorway, and we may as well get as far as we can from him, and at the same time not go far enough to get near the one at the next corner.”

After one or two attempts the hook became fixed on the ridge of the roof, and they at once climbed up, unfastened the hook, and slid down on the now snow covered tiles.  Two more roofs were crossed in the same way, and then they prepared to descend.  They had, when they put on their disguises, tied knots in the rope at a distance of a foot apart.  They now adjusted the hook on the parapet.

“Shall I go first, master, or will you?”

“I will go first, though in fact it matters little which of us does it; but first I must warm my fingers.  I don’t think that I could trust to them at present.”

He gathered a handful of snow, made it into a ball, and held it in his hands until the cold pained him, then he dropped the snow and thrust his hands up the sleeves of his doublet.  Paolo looked on in astonishment, but having great faith in his master imitated his example.

“That is a curious way of warming the hands,” he said.

“I daresay you have made snowballs in your time, Paolo, and if you have you will remember that, although it made your hands bitterly cold at first, after you had done they soon became almost as hot as fire.”

“I do remember that, master, but I should never have thought of it as a way of warming our hands.”

For a minute or two there was a sharp pain as the blood began to rush into the fingers, and when this passed off their hands were in a glow.  Hector took the rope, lowered himself over the parapet, and then began to descend.  When halfway down the darkness became more intense than before, and he knew that he was now below the level of the outer wall.  When he reached the ground he shook the rope as a signal, and then, stretching his arms before him, crossed the lane.  It was but a step, for the house stood but five feet back from the wall.  He waited until Paolo joined him, then he drew on the thin rope and, to his satisfaction, he felt it yield.

“Stand aside,” he said, “it is heavy enough to give one a nasty thump.”

Paolo withdrew a few paces, then Hector gave another pull.  The rope gave way at once.  He flattened himself against the house, and the hook fell with a dull thud a foot or two away.