Have just picked up this thread. I think Mary Howell (1751) is also in my tree - parents james Howel and Sarah? Can't find any trace of Sarah or of their marriage. Possibly 4 children - Sarah (b 1743), Samuel (b 1745), James (b 1748) and Mary (b 1851) all from St Briavels parish Records. If this is the same Mary I think she may have married Richard Edwards of Shirenewton in 1770.
Marilyn