Resta calls Perugino's colouring dry and sparing; Lanzi alludes to what he terms its skimpiness, but the very thinness of it is but proof of the artist's complete mastery of his medium, and that this medium was always mainly tempera, and was never what we know as oil painting is my distinct opinion, based upon an examination of almost every one of his works in Italy.
"Great Masters in Painting: Perugino"
George C. Williamson
There were fulnesses to be taken in and skimpiness to be redressed.
"A Book of Ghosts"
Sabine Baring-Gould