Thanks for the update. I got out of the house before your last e-mail arrived.
I have a copy of Nelson Jr. and Rosa Nero's marriage certificate from Grafton. Rosa is listed as being born in Sine Mountain,NJ. (This was from the transcribed record in typed print.) Neither I nor the town clerk knew where it was. I asked the clerk to go back to retrieve the hand entered record from 1900. Sure enough- it's written Sine Mountain,New Jersey.
There is not such place. The closest I could Google was Sinn Town, NJ (south of Morrestown).
When I Googled Line Mountain,NY, I got Lyon
Mountain,NY (about 25 + miles south of the Canadian border and about the same distance NW of Plattsburg,NY). The NY location makes more sense. Nelson Jr's mother, Adella (Edella) Broult, was born in Black Brook,NY. Edella's death certificate records her as being born in Plattsburg,NY. Two locations are about 25+ miles away.
I'll get working on the Nelson Sr. thread in NH. Thanks for your assistance.