brick wall in tracing my schwartz ancestry. grandfather nathan schwartz born nikolai russia 1883 and arrived ny 1900 to stay with cousin rafael preiss. nathan's mother may have remarried a sher. nathan's niece, ruth sher weber, lived in detroit. her sister, nettie sher, married a diamond in pennsylvania and was divorced shortly after birth of son herbert diamond, b. 1932. trying to trace nathan's parents through collateral branches. any help greatly appreciated.