There are 3 titles associated with this firm.

Costello , L.S. (1815). The maid of the cyprus isle, and other poems. by louisa s. costello. London: Sherwood, Neely, and Jones. Edmund Lloyd [23 Harley Street] John Sharpe [Piccadilly] James Harper and Co. [London] Richard Rees. John Walker VI.
Costello , L.S. (1815). The maid of the cyprus isle, and other poems. by louisa s. costello. second edition. London: Sherwood, Neely, and Jones. Edmund Lloyd [23 Harley Street] John Sharpe [Piccadilly] James Harper and Co. [London] Richard Rees. John Walker VI.
Downing , H. (1816). Mary; or, female friendship: a poem, in twelve books. by harriet downing. London: James Malcott Richardson. Thomas and Joseph Allman [Princes St] James Harper and Co. [London]