Herriman's explorations of duplication are fitting for a medium like the comics that exists through reproduction.

George Herriman, Krazy Kat, 24 Oct. 1938, 26 Oct. 1938, 27 Oct. 1938; rpt. in Patrick McDonnell, Karen O'Connell, Georgia riley de Havenon, Krazy Kat: The Comic Art of George Herriman (New York: Harry N. Abrams, 1986), 95-96.