Did you get a response to the email below? I am descended from Thomas....who went to New Zealand in 1862 and stayed.
I am from Sydney Australia, my fathers name is Gary Hearfield and his fathers name was Thomas Hearfield, his fathers name was Samual Hearfield would come to Australia as a teenage boy from Hull England. Samual had 2 bothers one named William but Im not sure if the other ones name was John or Tom, possibly Tom as my Grandfather may have been named after him. Im afraid that is all i know as my grandfather is dead and my grandmother doesnt remember anymore than that. I hope it helps. As i would like to know more myself.