I did well to let you proceed in your own way, instead of questioning you--but I have not yet done; and this time shall return to the method of interrogation."

"At your orders, general," said Swartz, whose quick glance showed that he was on his guard, and foresaw what was coming.

Mohun leaned toward the spy.

"Let us proceed to 'call names,'" he said. "The man you rescued from the grave was Colonel Darke?"

"Exactly, general."

"Is that his real name, or a false one?"

Swartz hesitated; then replied:--

"A false one."

"His real name?"

"Mortimer."

"And the lady is--?"

"His wife, general."

"Good," said Mohun, "you are well informed, I see, my dear Mr. Swartz; and it is a pleasure to converse with a gentleman who knows so much, and knows it so accurately."

"You flatter my pride, general!"

"I do you justice--but to the point. Your story was cut off in the middle. After the interview in Washington, you continued to see Colonel Darke and his wife?"

"I saw them frequently, general."

"In the army--and at their home, both?"

"Yes, general."

"Where did they live?"

"Near Carlisle, Pennsylvania."

"Where you were on a visit, just before the battle of Gettysburg?"

"Yes, general."

"Very good!"

And rising quickly, Mohun confronted the spy, who drew back unconsciously.

"Where is the paper that you stole from the woman that night?" he said.

Swartz was unable to sustain the fiery glance directed toward him by Mohun.

"Then Nighthawk has told you all!" he exclaimed.

"Colonel Surry saw you hide the paper."

Swartz looked suddenly toward me--his smiles had all vanished.

"The paper! give me the paper!" exclaimed Mohun; "you shall have gold for it!"

"I have left it in Culpeper, general."

"Liar!--give me the paper!"

Swartz started to his feet.

Mohun caught at his throat--the spy recoiled--when suddenly a quick firing was heard coming rapidly from the direction of Germanna Ford.

"The enemy have crossed, Mohun!" I cried.

Mohun started, and turned his head in the direction of the sound.

"They are advancing!" I said, "but look out!--the spy!--"

Mohun wheeled, drawing his pistol.

Swartz had profited by the moment, when our attention was attracted by the firing, to pa.s.s through the door, gain his horse at a bound, and throw himself into the saddle, with an agility that was incredible in one so fat.

At the same moment Mohun's pistol-shot responded, but the bullet whistled harmlessly over the spy's head. In an instant he had disappeared in the woods.

Mohun rushed to his horse, I followed, and we were soon riding at full speed in the direction of the firing.

As we advanced, however, it receded. We pushed on, and reached the bank of the Rapidan just as Mohun's men had driven a party of the enemy over.

It was only a small body, who, crossing at a private ford and surprising the sleepy picket, had raided into the thicket, to retire promptly when they were a.s.sailed.

The affair was nothing. Unfortunately, however, it had enabled the Federal spy to elude us.

Swartz had disappeared like a bird of the night; and all pursuit of him in such a wilderness was impossible.

An hour afterward, I had rejoined Stuart.

x.x.x.

GRANT STRIKES HIS FIRST BLOW.