Charles Norton Elvin, A Dictionary of Heraldry (1889), p. 126.
books.google.com
Honore-Theodoric-Paul-Joseph d'Albert de Luynes, Etudes numismatiques sur quelques types relatifs au culte d'Hecate (1835), 83f.
Classical Greek does not have *τρισκέλιον, but the form τρισκελίδιον'small tripod' is attested as the diminutive of τρισκελίς'three-pronged'. The form τρισκέλιον does exist in Katharevousa, however, as the term for a small three-legged chair or table (and also of the "Rule of Three" in elementary arithmetic or generally of an analogy). Adamantios Korais, Atakta (Modern Greek Dictionary), vol. 5 (1835), p. 54.
Samuel Birch, Charles Thomas Newton, A Catalogue of the Greek and Etruscan Vases in the British Museum vol. 1 (1851), p. 61.
Samuel Birch, History of Ancient Pottery vol. 1 (1858), p. 164.
Birch's use of triskelos is informed by the Duc de Luynes' triskèle, and it continues to see some use alongside the better-formed triskeles into the 20th century in both English and German, e.g. in a 1932 lecture by C. G. Jung (lecture of 26 October, edited in The Psychology of Kundalini Yoga: Notes of the Seminar Given in 1932. 1996, 43ff.).
