There are 5 titles associated with this firm.

Semple, Elizabeth. Short stories in words of one syllable. London: B. E. Lloyd and Son [50 Harley Street], 1822.
Macauley, Elizabeth W. Mary Stuart. By Miss Macauley. London: 1823.
Macauley, Elizabeth W. Mary Stuart. By Miss Macauley. London: 1823.
Macauley, Elizabeth W. Mary Stuart. By Miss Macauley. London: 1823.
Rennie, Eliza. Poems, by Eliza Rennie. London: B. E. Lloyd and Son [50 Harley Street], 1828.