There are 4 titles associated with this firm.

Sandham , E. (1815). Conversations on natural history: by the author of the "twin sisters," "trifles," "perambulations of a bee and a butterfly," &c, &c. Southampton: Thomas Baker [Southampton] William Darton, Joseph Harvey, and Samuel Darton.
Sandham , E. (1818). Conversations on natural history: by the author of the 'twin sisters,' 'trifles,' 'perambulations of a bee and butterfly,' &c. &c. Southampton: William Darton, Joseph Harvey, and Samuel Darton. Thomas Baker [Southampton]
Trench , M. (1818). Aubrey. in five cantos. Southampton: Isaac Fletcher.