"Memories, Dreams, Reflections". Book by Carl Jung, recorded and edited By Aniela Jaffe, translated by Richard and Clara Winston, p. 14, archive.org. 1963.
John Ruskin “Two paths. Lectures on art, delivered before the University of Oxford in Hilary Term, 1870. Aratra Pentelici. Time and tide. Pre-Raphaelitism. The eagle's nest. King of the Golden River. The relation between Michael Angelo and Tintoret”