Yet as he watched and waited his own horror grew. That for which in men we have as yet no term was strong within him, as in every beast that lives by perception rather than reason; and he too by this strange faculty knew well enough that something was abroad, raying out from that silent curtained unseen window--something of an utterly different order from that of dog or flung shoe and furious vituperation--something that affected certain nerves within his body in a new and awful manner. Once or twice in his life he had been conscious of it before, once in an empty room, once in a room tenanted by a mere outline beneath a sheet and closed by a locked door.
His heart too seemed melted within him; his tail too hung limply behind the stucco parapet, and he made no answering movement to the tiny crooning note that sounded once in his ears.
And still the horror grew....
Presently he withdrew one claw from the crumbling edge, raising his head delicately; and then the other. For an instant longer he waited, feeling his back heave uncontrollably. Then, dropping noiselessly on to the lead, he fled beneath the sheltering parapet, a noiseless shadow in the gloom; and his mate fled with him.