“Master Pawson’s abed, sir,” whispered Ben.

“Yes; not well,” was the reply, in the same low tone.

But there was no challenge from here, and Roy walked silently in at the arched door-way, passed the secretary’s door, and mounted the stair to severely admonish the sentry who was not keenly on the alert.

“Don’t let him off easy, Master Roy,” whispered Ben; “we might have been an enemy, sir, for aught he could tell.”

This was spoken with the sergeant’s lips to his young master’s ear, and a few moments later Roy was at the top of the little turret, and stood there in the door-way ready to pounce upon the man whom he expected to find asleep.

But to his great satisfaction the sentry was well on the alert, for he was kneeling at one of the crenelles, reaching out as far as he could, and evidently watching something away to the north, while all was so still and dark that the movement of a fish or water-rat in the deep moat below sounded loud and strange.

Roy stepped out silently, crossed the narrow leads, and

stood looking in the same direction as the sentinel; but he could make out nothing, and he was about to speak when the man, who had suddenly divined his presence, sprang up and clapped his hand to his sword.

“Stand!” he cried, hoarsely.