↑ Benjamin Haydon (1929). "Chapter XVII 1816–1817". Dalam Alexander P. D. Penrose (penyunting). The Autobiography and Memoirs of Benjamin Robert Haydon 1786–1846 Compiled from his "Autobiography and Journals" and "Correspondence and Table-Talk". Minton Balch & Company, New York. m/s. 231. During an 'immortal dinner' 28th December 1817 hosted by Haydon and attended by Wordsworth, Charles Lamb, Keats, and Keats's friend Monkhouse, Keats lightheartedly said Newton 'has destroyed all the poetry of the rainbow, by reducing it to the prismatic colours.' He then proposed a toast to 'Newton's health, and confusion to mathematics' to the amusement of all.
