According to the research of William Meade Olivett, Flornce with your dates was the daughter of Rowland Ollivett & Emma Lee. But then the family used the same name for many cousins in the same generations so it is confusing and difficult to trace. There are also a LOT of Dorn burials in the Clove Cemetery in Dutchess County. If I do manage to dig up more on Florence, I will let you know.