William Wordsworth (1837). “The Complete Poetical Works of William Wordsworth: Together with a Description of the Country of the Lakes in the North of England, Now First Published with His Works ...”, p.337
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.814, Library of America