It was well he did so, for, as he expected, a half-dozen pistol shots were heard, and the bullets crashed through the woodwork.

"Keep out of the line of fire, Hugh."

Hugh did so, and threw down the sacks close to the door. Several times he ran backwards and forwards across the room, the assailants still firing through the door. Then Rupert leapt up, and the pile of sacks were rapidly heaped against the door, just as the men outside, in hopes that they had killed the defenders, made another rush against it.

This time, however, the pile of sacks had given it strength and solidity, and it hardly shook under the assault. Then came volleys of curses and imprecations, in German, from outside; and then the lads could hear the steps descend the stairs, and a loud and angry consultation take place below.

"Open the shutters, Hugh, and let us see where we are."

It was a chamber of some forty feet square, and, like those below it, of considerable height. It was like the rest of the mill, built of rough pine, black with age. It had evidently been used as a granary.

"This is a nice trap we have fallen into, Hugh, and I doubt me if Lord Fairholm ever saw the letter with his name upon it which lured me here. However, that is not the question now; the thing is how we are to get out of the trap. How many were there outside, do you think?"

"There seemed to me about a dozen, Master Rupert, but I got merely a blink at them."

"If it were not for their pistols we might do something, Hugh; but as it is, it is hopeless."

Looking out from the window they saw that it was over the great water wheel, whose top was some fifteen feet below them, with the water running to waste from the inlet, which led from the reservoir higher up the valley.