There are 3 titles associated with this firm.

Seward , A., & Pratt , S.J. (1817). Monody on major andre; and elegy on captain cook. also mr. pratt's sympathy. a poem. tenth edition. London: John Rodwell and Martin. Longman, Hurst, Rees, Orme, and Brown. Nathaniel Hailes [173 Piccadilly] John Taylor and James Augustus Hessey. Thomas and George Underwood. R. Jennings. James Harper [London] John Otridge [1816-21]
Stevens , G.B. (1818). Llewellen, or, the vale of phlinlimmon: a novel. in three volumes. Edinburgh: Macredie, Skelly, and Co. Thomas and George Underwood.