"French Music: From the Death of Berlioz to the Death of Fauré". Book by Martin Cooper (p. 136), 1951; later quoted in "Debussy and Wagner", book by Robin Holloway (p. 207), 1979.
William Gilbert, Galileo Galilei, William Harvey (1984). “The Selected writings of William Gilbert, Galileo Galilei, William Harvey ; illustrated by Marc Yankus”