We believe Barbara Mannion Cain's date of death is March, 1894. That date, plus her age at death of 76 and that she is from Clifden (spelled "Clifton"), is on her gravestone in St. Vincent's Cemetery, Kingsville, Randolph County, West Virginia. We visited the cemetery in 2008 and in 2012 and took a photos of the gravestone. Michael Cain's gravestone is in the same cemetery. Also, after searching the Allegheny County, Pennsylvania death records--where McKeesport is located--for Barbara Cain, I found no record. Are you certain she died in 1886?