“Better put the blue-jacket on guard over us,” laughed Katherine.

“By Jove! a very good idea.”

Dorothy saw all levity depart from his face, giving way to a look of sternness and command. Although he was engaged in a joke, the subordinate must see no sign of fooling in his countenance. He said a sharp word to a blue-jacket, who nimbly sprang to the end of the settee, raised his hand in salute, and stiffened himself to an automaton. Then the girls saw the tall figure of the Lieutenant wending its way to the spot where the commander stood.

“I say, Dorothy, we’re prisoners. I wonder what this Johnny would do if we attempted to fly. Isn’t the Lieutenant sumptuous?”

“He seems a very agreeable person,” murmured Dorothy.

“Agreeable! Why, he’s splendid. I tell you, Dorothy, I’m going to have the first dance with him. I’m the eldest. He’s big enough to divide between two small girls like us, you know.”

“I don’t intend to dance,” said Dorothy.

“Nonsense, you’re not going to sit here all night with nobody to speak to. I’ll ask the Lieutenant to bring you a man. He’ll take two or three blue-jackets and capture anybody you want.”

“Katherine,” said Dorothy, almost as severely as if it were the elder sister who spoke, “if you say anything like that, I’ll go back to the house.”

“You can’t get back. I’ll appeal to the guard. I’ll have you locked up if you don’t behave yourself.”