I too am a great-great granddaughter of Capt. John and Mary. Our information shows that George was born in Samoa in 1870. Capt. John and Mary did not return to the states until about 1880. We have documentation of these facts. Nothing shows any of the sons going to Australia. They either stayed in Texas, went to New Mexico, Arizona or Washington state. I'll be glad to share what I have and would love to have your great grandfather's history. The coconut plantation was taken back by the Samoan government in the 1960s because of taxes. You can contact me direct at email@example.com
. Hope to hear back from you soon.