His voice had sunk to a whisper, and he drew me into the shrubbery, as a long bar of light, issuing from the door in the rear of the house, ran out into the night.

“I am going to follow her,” whispered Nighthawk, placing his lips close to my ear, “she is at her devil’s work here in Richmond, as Swartz was—.”

Suddenly he was silent; a light step was heard. A form approached us, passed by. I could see that it was a woman, wrapped from head to foot in a gray cloak.

She passed so close to us that the skirt of her cloak nearly brushed our persons, and disappeared toward the gate. The iron latch was heard to click, the door of the carriage to open and close, and then the vehicle began to move.

Nighthawk took two quick steps in the direction of the gate.

“I am going to follow the carriage, colonel,” he whispered. “I have been waiting here to do so. I will tell you more another time. Give my respects to General Mohun, and tell him I am on his business!”

With which words Nighthawk glided into the darkness—passed through the gate without sound from the latch—and running noiselessly, disappeared on the track of the carriage.

I gazed after him for a moment, said to myself, “well this night is to be full of incident!”—and going straight to the door in the rear of the house, passed through it, went to the door of Mr. X——-’s room, and knocked.

“Come in,” said the voice of that gentleman; and opening the door I entered.