I am trying to trace gr-grandparents. Apolonia Screiber married Konrad (Conrad) Nagengast in Bavaria in 1860, and she was very young at the time. They came to the US and settled in Meadville, Pa. They had 12 or 13 children, of which 9 lived.I believe all children were born in Meadville, beginning around 1870 or a little earlier.Their household was missed in the 1900 US census. Any info would be helpful.