There are 2 titles associated with this firm.

Hemans , F. (1835). Songs of the affections, with other poems. by felicia hemans. second edition. Edinburgh: William Blackwood [Princes Street] Thomas Cadell Jun.
Moir , D., & Hemans , F. (1836). Poetical remains of the late mrs. hemans. London: William Blackwood and Sons. Thomas Cadell [London]