John's wife was Margaret. Katherine was her sister who married John Morlock. Margaret was born in August 1848 in Kennfus, Rheinland, Prussia and died in Schenectady, NY in 1915. I have a photograph of her tombstone (her husband John and their son Jacob are also buried in the same plot). Thanks for providing information for their daughter Katherine (whom I have listed as Katie in accordance with the 1880 U.S. Census).