He did not consider himself in the least an intruder.

This was his uncle's house, and his uncle and his cousin were far away.
The door made no sound as it swung back, and soundless, too, was Dick as he stepped within.

It was dark in the big hall, but as he stood there, listening, he became conscious of a light.

It proceeded from one of the rooms opening into the hall on the right, and a door nearly closed only allowed a narrow band of it to fall upon the hall floor.
Dick, believing now that a robber had indeed come, drew a pistol from his pocket, stepped lightly across the hall and looked in at the door.
He checked a cry, and it was his first thought to go away as quietly as he had come.

He had seen a man in the uniform of a Confederate colonel, sitting in a chair, and staring out at one of the little side windows which Dick could not see from the front, and which was now open.