Thomas Hobbes (1750). “The Moral and Political Works of Thomas Hobbes of Malmesbury: Never Before Collected Together : To which is Prefixed, the Author's Life, Extracted from that Said to be Written by Himself, ...”, p.12
William Wordsworth, Adam Sedgwick (1842). “A complete guide to the Lakes, comprising minute directions for the tourist, with mr. Wordsworth's Description of the scenery of the country, &c. and Three letters upon the geology of the Lake district, by prof. Sedgwick”