Jack, I may have found a few answers since then, but I have many more yet to find. You mention a "John Williams Tree" that I am most interested in. I have my own database file on John Williams as he is my direct ancestor. As for the Tonkin descendents, the only one I have any info on is Emma Elizabeth who married Robert Almon Spencer. If Marietta is "Marie M.", the only info I have is she married J.F. Woods, and then I lose track of her.
If we could communicate off line, my email address is firstname.lastname@example.org
. Thanks for your posting, maybe I can find out a few more answers to this side of my tree.