S. Mills. Adelaide, South Australia.
My name is Sara, and I am also a descendant of MCL DeLaine (he is my GGG Grandfather, a decedent of his 10th child, Arthur); and I am trying to trace him back too. The information you have is great, it's more than I know myself from my Grandma, and the DeLaine Family History Book (which we inherited after she died in 2009). I have hit a brick wall too when trying to establish MCL's French decedents, but I am studying at Flinders to be an Historical Archaeologist, so am taking any opportunities and tips to find new leads. I am going to some archive/family history search courses during May (History Month), and am planning to ask someone I know, who speaks French, to help me access the Le Havre Seine-Maritime archives. I will let you know if I can come up with any updates!
I would love to be able to add/update the DeLaine family book, as we have at least 9 new GGGG Grandchildren to add to the list since it was published in 2008!
Sorry I can't add anything new, but I thought you might be interested that my family is also looking for information on MCL!