Hi List: I am searching for information on the Henderson families of Allegheny and Indiana Counties in PA. My gggg grandfather was Robert Henderson, born around 1770 to 1775, probably in either Ireland or in Indiana County . He died in Allegheny County in 1839. He had sons Alexander, Thomas (my direct ancestor), John and James and daughters Elizabeth, Mary and Nancy. Elizabeth married a man with the surname of Conyer or Conyers and Mary married a Prentice. Any info at all will be most appreciated. Thanks and Happy New year! Karen Conley klconley@webtv.net