Thanks Judith. I didn't want to overload my query post but here's what I'd found:
Q4 1851 Torrington, Stephen SAUNDERS married Rachel SAUNDERS
1855 Sons' baptisms, abode Rosemary Lane, Great Torrington(?)
1861 Census, residing Calf Street, Great Torrington
1866 Burial of son Stephen, abode Calf Street, Great Torrington
1871 Census, residing Goose Green, Great Torrington (appears to be a terrace of houses on Calf Street at the junction with East Street)

Can find no trace of a Rosemary Lane in Great Torrington but would seem odd for it to be elsewhere