1963, Margery Allingham, The China Governess Chapter 20, ‘No. I only opened the door a foot and put my head in. The street lamps shine into that room. I could see him. He was all right. Sleeping like a great grampus. Poor, poor chap.’
2013-07-19, Ian Sample, Irregular bedtimes may affect children's brains, Irregular bedtimes may disrupt healthy brain development in young children, according to a study of intelligence and sleeping habits. ¶ Going to bed at a different time each night affected girls more than boys, but both fared worse on mental tasks than children who had a set bedtime, researchers found.
1995, Angela Carter, The Bloody Chamber and Other Stories (page 144)... there are no words to describe the way she negotiated the abyss between her dreams, those wakings strange as her sleepings.