Perceiving in example sentence
Sergeant Hollister turned promptly on his heel, and seizing big saber, the steel was glittering by the firelight, in the twinkling of an eye; but perceiving the intruder to be the peddler, who stood near the open door that led to the lean-to in the rear, he began to fall back towards the position of the black, with a military intuition that taught him to concentrate his forces.