Book: Rice, Dennis G. 1971 The Illustrated Guide to Rockingham Pottery and Porcelain.
• Squirrel with CL2 mark and incised "No. 111" : pl. 163, Discusses gilt collar (also used on Derby squirrels) and the practise of keeping squirrels as pets in the late eighteenth and nineteenth century: pp. 79, 80, For mark information: pp. 104- 05, 109- 1Book: Rice, Dennis G. 1989 English Porcelain Animals of the 19th Century.
• Derby example c.1800- 30: fig. 131Book: 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.