The animal planted himself in the stream of moonlight that came in through the window, facing Calumet and emitting a series of short, high-pitched, resentful barks.
There was humor in this situation, but Calumet did not see it.

He heard a cry of surprise from the direction of the dining-room, and he turned just in time to see the office door closing on a flood of light.
With savage energy and haste, he pulled on his boots, darted out of the house, ran across the rear porch, leaped down, and ran around the nearest corner of the house.

As he ran he jerked his pistol from its holster.
When he got to the front of the house he bounded to the door of the office and threw it violently open, expecting to surprise Betty and her confederate.

He was confronted by a dense blackness.

He dodged back, fearing a trap, and then lighted a match and held it around the corner of one of the door jambs.