My grandmother (Bridget Naughton Dowd) had a sister Mary Naughton Downs. Sometime between 1910 and 1920 they moved to Newark NJ. This has been a mystery to me for many years. She was also a problem because, try as I might, I have not found them in the 1900 census. I am sure they were living in the same place, but not in the census.
A few days ago I was looking at my tree on Family Search and found a few matches. It appears that they were added more recently and the person did not have enough information for them to come up as a match. That is what it appears to be to me. I do not know how to go about merging the information for this double family.
Anyway, what the woman did have was a little note that indicated that Mary Naughton Downs died in NJ and was buried in Pittsburgh, a s well as her date of death. One of my favorite resources is CATHOLIC CEMETERIES OF THE DIOCESE OF PITTSBURGH. This is a relatively new resource, just within the past year or two.
I remembered I had a old document from the WESTERN PENNSYLVANIA GENEALOGICAL SOCIETY. It was the death of one of Mary's daughters Rebecca who was born and died within four days in 1895 and the place of internment was St. Mary Cemetery in Pittsburgh. So with that information I went to the Catholic Cemeteries and there I found the family. This included Mary, her husband Michael, infant who died in 1895, a daughter Hannah who died in 1901 (I had no knowledge of Hannah, and two adult daughters Margaret and Sadie who lived with their mother in NJ and were buried in the family plot, included with the dates of their deaths. I know now I have the correct Mary.
A married daughter Mary Downs Molloy also had her date of death in 1929 and where she was buried. In the 1930 census the two children of Mary and Dominic were living with their grandmother in Newark. Also indicated was the death of Dominic in about 1975. My theory is now he was unable to care for the children and Mary Naughton raised them. But why, did the two families move to NJ, was Mary Molloy sick and Mary Naughton move to take care of her daughter.
I sent an email to the woman who posted the information but have not heard back as of today.