Chris, I know nothing about John Henry's family, you might check Lafayette Co. MO. that is where he married Thankful Ruth Hanna, my line, their children were John Henry born 1875 in Texas, William, Katie and Lily H. born 1872.
I found Thankful living in KS. with a sister. Can't remember the census year right off hand but she was a Widow. Mail me at hubcap15@spiritone.com. Interesting you live in Australia. Sorry I didn't get notice of this posting. Janie