you."

"Yes; the best spy, you say, in the Federal army."

"I think he is, general. He is a wonderful man. He recently played a
trick upon you."

"Upon _me_?"

"At least he bore off a prisoner from you. It was a lady, captured by
Colonel Mohun, one night on the Rappahannock."

"Ah! Is it possible! So Swartz was the old countryman, driving the
wagon that morning."

"So he informed me, general."

"You are friends, then?"

"Close friends."

And Mr. Nighthawk smiled.

"We have an agreement--but that would not interest you, general. That
was really Swartz, and the old woman was the prisoner."

"Well," said Stuart, "that was a bold stroke, but the lady was handsome
enough to make friends. There is something between herself and Colonel
Mohun, is there not?"