John Muir (1997). “Nature Writings: The Story of My Boyhood and Youth, My First Summer in the Sierra, the Mountains of California, Stickeen, Selected Essays”, p.517, Library of America
Henry James, William Veeder, Susan M. Griffin (1986). “The Art of Criticism: Henry James on the Theory and the Practice of Fiction”, p.232, University of Chicago Press
Francis Quarles (1844). “Enchiridion Institutions, Essays and Maxims, political, moral & divine. Divided into four centuries. By Francis Quarles”, p.75