There are 3 titles associated with this firm.

Opie, Amelia. Illustrations of lying, in all its branches. By Amelia Opie. Exeter: John Calvin Gerrish, 1829.
Opie, Amelia. Illustrations of lying, in all its branches. By Amelia Opie. Exeter: John Calvin Gerrish, 1832.
Porter, Anna M. The Hungarian Brothers. In Two Volumes. By Miss Ann Maria Porter. Exeter: John Calvin Gerrish, 1832.