BYFORD: On the Physiology of Exercise. Amer. Jour. of the Med. Sciences, 1855, No. 59.
On the Physiology of Repose or Sleep. Amer. Jour. of the Med. Sciences, April, 1856.
CATLIN: Shut Your Mouth, 1870.
CONDILLAC: Essai sur l’origine des connaisances humaines, Sect. I,
The Psychology of Sleep · The Wunder Library — complete classics, free to read, with narration.