Where to start?I'm also a descendant of the Sadler line.Your Great-Grandfather, Lorenzo Dow Sadler, was born 04/1865 in Pennsylvania and died 09/01/1951 in Los Angeles CA.The "William" you mentioned was his brother.From the research I've done Lorenzo married Maty (Rupple) Austin in 1898. There is indication there was a marriage before that but I have no details.I also have information showing children born to Lorenzo named Hariett (b. 1869), Mabel (b. 1875), Lorenzo D. (b. 1841), Lucinda (b. 1843), and Theodore (b. 1845.These are all before he married your Great-Grandmother Maty so it does point to a prior marriage.Interestingly enough, there is no mention of an "Ernest" anywhere that I've come across?If you're interested in going back further than Lorenzo let me know.Happy Hunting!