After reading your post I thought you had been reading my genealogy. I did discover some information but nothing that provides any information that extends George James family. I found a death record for Mary A. Gent in Honiton, Devon, England, Mar Q 1943. No proof that this is really our Mary Ann. My records show that her husband was Frank, not George. It also appears that there were two daughters named Alice Sefrone. The first was born Dec Q 1866 and died Jun Q 1867. The second was born Mar Q 1868. Alma Lotty died Dec Q 1972 and Hilda Maude (Maud) died Dec Q 1942. If this is correct, neither married.
I'm guessing that you are my second cousin