I'm lucky that I even know who the picture is of but there is no date.A small slip of paper was behind the framed picture and only said Aunt Mary Wintersteen. She is wearing a white simple bonnet tied under the chin and a fairly plain dark dress. The bonnet would seem to fall more in with the dates you gave rather than the late part of the century.It probably ended up in Seneca Co. NY through the VanNostrand, Todd or Monroe families who came from Somerset Co. NJ in the 1800's. Have you any other information on Mary Ann Wintersteen? No rush to answer since I'll be away for over a week beginning today. Thanks for answering.