“Corporal of the guard No. 4,” yelled the sentry; and the call was caught up and repeated by another sentinel who stood at the farther end of the academy, and finally reached the ears of the corporal, who was toasting his shins in front of a warm fire in the guard-room.

“What do you want the corporal for? Here’s our pass,” said Don; and taking the paper in question from his pocket he thrust it between the bars of the gate.

Still the sentry made no reply, nor did he seem to know that Don had spoken to him. He brought his musket to a “support,” and paced back and forth on the other side of the gate with slow and dignified steps. Don muttered something under his breath, and Bert believing that he was grumbling at the sentry for being so uncivil, laid his hand on his brother’s arm and said, in a low tone—

“Don’t be angry with him. Perhaps he is not allowed to talk while he is on duty.”

Don said nothing. He began to believe that he and Bert had unwittingly got themselves into trouble again, and when the corporal came up, he found that he had not been mistaken.

“What’s the matter here?” demanded the officer.

“There are a couple of plebes out there who want to come in,” was the sentry’s reply.

“Who are you?” said the corporal, peering through the pickets at the two brothers.

Don gave him their names; whereupon the corporal took a key down from a nail in the sentry’s box, and after unlocking the gate told the boys to come in. They obeyed, and the officer having returned the key to its place drew a note-book from his pocket and wrote something in it. “That’s all right,” said he, as he closed the book and put it back in his pocket.

“Have we done anything wrong?” inquired Bert, in anxious tones.