Tylor.—Anthropology.
Rowbotham.—History of Music.
Smith.—The World’s Earliest Music.
Grosse.—The Beginnings of Art.
Raymond.—The Genesis of Art.
Helmholtz.—The Sensations of Tone.
Parry.—Evolution of the Art of Music.
Bosanquet.—History of Aesthetic.
Knight.—Philosophy of the Beautiful, Part II, Chap. IX.