Dictionary of National Biography, 1885-1900/Slade, William
SLADE, WILLIAM (fl. 1380), philosopher, was a Cistercian monk of Buckfastleigh, Devonshire. One of his works on Aristotle's ‘De Anima’ was seen by Leland at Buckfastleigh, another on the ‘Sentences’ at Fountains. His ‘Questiones Ethicorum’ were formerly at Magdalen College, Oxford. Leland also attributes to him ‘Universalia super libros physicorum’ and ‘Flosculi moralium.’
[Tanner, p. 677; Visch's Bibl. Cisterc. 1649, pp. 124–5; Leland's Collectanea, iii. 41, 258; Bale's Scriptores, vi. 74.]