Book: Fennimore, Donald L., et al. 1992 The David and Peggy Rockefeller Collection: Volume IV Decorative Arts.
• Possible Meissen prototype (with chain): p. 77, no. 59, c. 1750, crossed swords mark, Kandler modeler. [per Leslie Grigsby 2003]Book: Oswald, Adrian, et al. 1982 English Brown Stoneware 1670-1900.
• Salt-glazed brown stoneware squirrel in similar pose: p. 146, no. 108, Brampton, probably Briddon, Derbyshire.