John Dryden (1767). “THE MISCELLANEOUS WORKS OF JOHN DRYDEN, Esq; Containing All His ORIGINAL POEMS, TALES, AND TRANSLATIONS, IN FOUR VOLUMES.: VOLUME THE SECOND”, p.31
Claude Debussy's statement of 1910, as quoted in "Debussy on Music" edited and translated by Francoise Lesure and Richard Langham Smith (p. 243), 1977.