Kahryn on Family Tree Circles

Hello, from rainy Sheffield Yorkshire England! I'm attempting to trace Thomas Harvey Reseigh and his wife Frances Sarah Reseigh. Also Thomas' brother and family - James and Elizabeth Mary Reseigh and their daughter Alice Louisa Reseigh. From what I can gather they emigrated to South Australia from England - James doesn't appear in the English Census after 1871 and Thomas appears in 1881 but not after that. The brothers originate from Paul, Cornwall and the girls where born in - Frances in Limehouse and Elizabeth in Chatham Kent. I would dearly like to find them! Seems like a black hole at the moment!
Regards
Kathryn