I'm looking for more information on Matthew Cassidy, born about 1845 (perhaps in Ireland) and married Sarah McBriar, born about 1846. They are listed in the 1880 Census of Pine Township, Indiana County, PA but I can not find from where Matthew came. I can find some info on Sarah but not enough for me to consider valid. Matthew and Sarah had 3 children that I know of: all girls; Catherine Amanda (b July 1872, died 1913, married Jeremiah Lute), Mary (b. 1877 married David Lambing) and Margaret Elizabeth (my GGrandmother) b 1880 d. 1948 in Hastings, PA.
Any info would be appreciated. I'm willing to share what I have thus far.