There are 2 titles associated with this firm.

Potts , E.M. (1833). Moonshine . . . containing miscellaneous trifles. London: John Rodwell [1812-1816, 1827-1854] Henry James McClary.
Potts , E.M. (1833). Moonshine . . . containing sketches in england and wales. London: John Rodwell [1812-1816, 1827-1854] Henry James McClary.