Cf. Pat Halfpenny, English Earthenware Figures, 1740-1840 (Suffolk, 1991), p. 236, pl. 69 and p. 274, for examples of Wombwell's menagerie groups.
See also Reginald Haggar, Staffordshire Chimney Ornaments (London, 1955), for a discussion of Polito's menagerie, another travelling circus of the early nineteenth century. There are many similarities in the Polito and Wombwell table-base groups and it is suggested that after Polito's death in 1814, the potters adapted this model slightly to do service for Wombwell.