In checking my info on Zechariah son of William,I do not find a son by the name of Augustus.But I do know that Zachary of Madison County,Oh had a son named Gustus born about 1858, who is listed in the 1870 census as 11 yrs old. Union Tws. Madison County,Oh. I believe my gr gr grandfather was always known as Zachary not Zachariah(or possibly as Zach). If Zach is your gggggrandfather there is an obit for he and his wife,Ann at the London Library microfilms on 12-04-1872 and 09-04-1895.