There are 2 titles associated with this firm.

Opie, Amelia, et al. The Juvenile Forget Me Not. A Christmas and New Year's Gift, or Birthday Present, For the Year 1830. Edited by Mrs. S.C. Hall. London: Nathaniel Hailes [168 Piccadilly], Frederick Westley and A.H. Davis, Robert Jennings, 1830.
Hofland, Barbara, et al. The Juvenile Forget Me Not. A Christmas and New Year's Gift, or Birthday Present, For the Year 1831. Edited by Mrs. S.C. Hall. London: Nathaniel Hailes [168 Piccadilly], Frederick Westley and A.H. Davis, Robert Jennings, 1830.