I thought that looked like a different family, from Walcot, Bath, since they spell their name Perryman. The original post is asking about a Perriman family from Keynsham who moved to Marshfield. The Ann Perriman who died “Perriman “ as noted above, could be Ann Butcher, the wife of Thomas Perriman jnr, the son of the Thomas in the original post as they turn up in Marshfield too (1871 census) They also have a son called Isaac and a bit of research finds a marriage between Thomas Perriman and Ann Butcher in Walcot St Swithin, Somerset, which ties in with what you said.