"'I wonder why she told me not to sleep on the left side of the bed?' he said to Martin, as they began to undress.
"Tristram glanced guiltily at the mirror. For reasons of his own he hadn't as much as hinted to Heriot what he had seen there the previous night, and he was not at all sure now that it might not have been a nightmare or an hallucination; anyhow, he would like to put it to the test before mentioning it to anyone, and Heriot, whom he knew to be a sceptic with regard to ghosts, was so strong and hale a man physically that, happen what might, he had no apprehensions whatever concerning him.
"Regretting that he was obliged to disobey the wishes of a lady, Heriot declared his preference for the left side of the bed, adding that if the maiden was so highly enamoured of him, she must put herself to the inconvenience of a few extra yards. 'Infatuation like hers,' he maintained, 'should surely overcome all obstacles.'
"Nothing loth, Tristram gave in to him, and before many minutes had elapsed both men had fallen into a deep sleep.
"On the stroke of two Tristram awoke, perspiring horribly. The room was once again aglow with a phosphorescent light, and he felt the presence next to him of something cold and clammy.
"Unable to look elsewhere, he was again compelled to gaze in the mirror, where he saw, to his consternation and horror, no Heriot, but in his place the man with the bronzed face and bushy beard.
"He had hardly recovered from the shock occasioned by this discovery when the door surreptitiously opened, and the figure of the ape glided noiselessly in.
"Again he was temporarily paralysed, his limbs losing all their power of action and his tongue cleaving to the roof of his mouth.
"The movements of the phantasm were entirely repetitionary of the previous night. Approaching the bed on 'all-fours,' it leapt on its victim, the tragedy being accompanied this time by the most realistic chokings and gurgles, to all of which Tristram was obliged to listen in an agony of doubt and terror. The drama ended, Tristram was overcome by a sudden fit of drowsiness, and sinking back on to his pillow, slept till broad daylight.
"Anxious to question Heriot as to whether he, too, had been a witness of the ghostly transaction he touched him lightly on the shoulder. There was no reply. He touched him again, and still no answer. He touched him yet a third time, and as there was still no response, he leaned over his shoulder and peered into his face.