In those low latitudes the transition from night to day, and _vice versa_, is extraordinarily rapid, occupying but a few minutes; and, even as we stood watching, the pallor strengthened and spread to right and left and upward, suggesting the stealthy but rapid withdrawal of an infinite number of dark gauze curtains from the face of the firmament, until presently the eastern quadrant of the horizon became visible, the pallid sea showing like a surface of molten lead, sluggishly undulating like the coils of a sleeping snake, while overhead stretched an unbroken pall of dark grey cloud that seemed to promise a drenching downpour of rain before long.
