There are 5 titles associated with this firm.

Richardson , C.E. (1828). Poems, by mrs. g. g. richardson, dumfries. Edinburgh: Robert Cadell and Co. [41 St. Andrew Street] Simpkin, Marshall and Co. William Crofts.
Richardson , C.E. (1828). Poems, by mrs. g. g. richardson, dumfries. second edition. Edinburgh: Robert Cadell and Co. [41 St. Andrew Street] Simpkin, Marshall and Co. William Crofts.
Richardson , C.E. (1828). Poems. by mrs. g. g. richardson, dumfries. Edinburgh: Robert Cadell and Co. [41 St. Andrew Street] Simpkin, Marshall and Co. John Sinclair.
Corbett , M., & Corbett , M. (1828). Tales and legends. by the authors of "the odd volume," &c. in three volumes. Edinburgh: W. Simpkin and R. Marshall. Robert Cadell and Co. [41 St. Andrew Street]
Richardson , C.E. (1829). Poems. by mrs. g. g. richardson, dumfries. Edinburgh: Robert Cadell and Co. [41 St. Andrew Street] Simpkin, Marshall and Co. John Sinclair.