Hi,My great, great grandmother Rose Tobin lived in Castlecomer, born in 1840. She had a son, John Blanchfield (my grandfather) illegitimately, in 1870 in Baurnafea. We can't trace what happened to her after her son left Ireland to fight in the Boar War. We think she married Lawrence Dunne (or Dewane) and remained in Castlecomer, although this may be incorrect. Could she be related to your James Tobin?
Kind regards
Barbara