HiAndrew
James Parker, son of Lace Parker and Esther Sayle is my G'G'G' Grandfather. I am currently doing our family tree for my Father. I was astonished to come across your article. I had no idea that there had been a name change so, if that is correct, I cant help you but I am able to give you names of descendants. I don't have a date for his death but I have his last address in Sydney. There was more than one Esther Sayle on IOM.
Regards
Lisa