There are 4 titles associated with this firm.

Roche I , R.M. (1814). Plain tales. by mrs. roche, author of "the moor", &c. in two volumes. London: George Walker, Publisher of Books and Music.
Roche I , R.M. (1814). Plain tales. by mrs. roche, author of "the moor", &c. in two volumes. London: George Walker, Publisher of Books and Music.