[87] Cennini, c. 1400, in Merrifield, 1844, A Treatise on Painting. Written by Cennino Cennini in 1434, p. 21. A more recent translation is published by Broecke, Cennino Cennini’s Il libro dell’arte: A New English Translation and Commentary with Italian Transcription, p. 60. De Arte Illuminandi, National Library Napoli, HS 1II.E.27, 1350-1400. In Brunello, 1992, De Arte Illuminandi, p. 46, 47