Date: 1667; 2nd ed. in 1674

"Then feed on thoughts, that voluntary move / Harmonious numbers; as the wakeful bird / Sings darkling, and in shadiest covert hid / Tunes her nocturnal note."

— Milton, John (1608-1674)

Date: 1763 (repr. 1776); 1794 (repr. 1799)

"When the senses are gently and naturally shut up, and the command over the body intermitted, as in sleep, if we think at all we are said to dream; and generally wander through airy tracks of thought, which have no agreement with each other, nor are at all corrected by the judgment."

— Doddridge, Philip (1702-1751)