Date: 1384

"O Thought, that wroot al that I mette, / And in the tresorie hit shette / Of my brayn!"

— Chaucer, Geoffrey (c. 1340-1400)

Date: 1390

"Minerve for the hed thei soghten, / For sche was wys, and of a man / The wit and reson which he can / Is in the celles of the brayn, / Wherof thei made hire soverain."

— Gower, John (c. 1330-1408)

Date: w. c. 1425-1440

"Then wolle the chambir of my thought trewly / Of plesaunce take a light in eche parté / Such ioy wolle him aray so fresshe and hy / That waken must myn heuy hert slepé / Out of his fowle and sluggissh slogardé."

— Charles [d'Orléans], duke of Orléans (1394-1465)