I don't know if you are still looking for information but, if you are, I can provide some. William Henry Clark and Hannah Rose had a daughter, Bertha May Clark b 20 May 1875 in Canada and died 28 Nov 1948 in Hannibal, Oswego Cty, NY. She was my great grandmother. She married Roy Welling of Oswego, NY and their daughter, Marion E Welling was my grandmother. She dies in 1990 in Florida. Marion married Howard L Marsh and had 2 children, my mother Beverley jean Marsh and my uncle Mahlon Clark marsh, both of whom are alive. My mother lives in Sayre, PA and my uncle recently relocated to S. Dakota from Seattle, WA. I hope this helps. If you have informationon William Henry Clark's and Hanah Rose's ancestors I would be very interested in that information. My family tree is titled Michael D Anthony Family Tree.