Note 230 — Chapter XV · ARTISTS WHO PAINTED WITH THE PENCIL.
Reading edition
“Penicillus.” This was the hair-pencil or brush, which was used by one class of painters, in contradistinction to the stylus or cestrum used for spreading the wax-colors. Painters with the brush used what we should term “water-colors;” oil-colors, in our sense of the word, being unknown to the ancients.