It was a look so intelligent, yet inexplicable, perverse, sometimes so malicious, but generally accompanied by a wild flow of spirits, that Hester could not help questioning at such moments whether Pearl was a human child. She seemed rather an airy sprite, which, after playing its fantastic sports for a little while upon the cottage floor, would flit away with a mocking smile. Whenever that look appeared in her wild, bright, deeply black eyes, it invested her with a strange remoteness and intangibility; it was as if she were hovering in the air, and might vanish, like a glimmering light that comes we know not whence and goes we know not whither." - Hawthorn 42