Anna (Cummisky) Lynch of Curraghan, County Leitrim, and Port Jefferson, Suffolk County, New York

In 1941, Mrs Martin Lynch of Belle Terre Park, Port Jefferson, Long Island, received a letter from the town of Sligo, County Sligo, Ireland.I first saw this letter on the Jim Forte Postal History website. I'm not sure if it is still for sale there or not. Can we identify Mrs Lynch, and can this envelope help us find her county of origin in Ireland?

In 1940, Mrs Anna Lynch, a widow, was living in Belle Terre, Port Jefferson, NY. She was 66 and had been born in Ireland. She and her husband Martin had been in the same town since at least 1925. Before that they had lived in Poughkeepsie, New York. In fact I found Martin there in 1880 with his parents and four siblings. The parents had been born in Ireland, but Martin, his brother, and sisters were all born in New York.United States and New York State Censuses of Poughkeepsie, NY and Port Jefferson, NY.

Anna and Martin had three children that appear on the censuses: Thomas, Phillip, and Catherine. Anna died on February 15, 1966.United States Social Security Death Index. I didn't find the record of Martin's death.

Update

The first time I worked on this family I came to a dead end at this point, unable to find Anna's place of origin in Ireland. Since then I was able to get to the library and use their edition of ancestry.com. In the Social Security Applications database, there was an entry for Anna Lynch that said she was born July 1873, in County Leitrim. Her parents were Phillip Comisky and Katherine Dolan. Her 1900 Census in Poughkeepsie said she was born in July 1873 as well.

So I came home and looked for the civil registration of her birth and found:

born July 18, 1873, Anne [daughter of] Philip Cummisky, a farmer of Curraghan, and Catherine Cummisky, formerly Dolan, born in Curraghan Townland, Drumlease Civil District, County Leitrim (Superintendent Registrar's District of Manorhamilton).

Her parents are on the 1901 census of Ireland, living in house 3 in Curraghan (Sramore, Leitrim). Her mother and brother were still in Curraghan in 1911.

Which might explain why she also received a letter from County Leitrim in 1941:

As for the letter from Sligo, Anna had a sister Ellen who married John O'Hara, a postman of Sligo, on November 19, 1903. They were living in Sligo East in 1911 with three children.

Conclusion

So in retrospect, I suppose the envelopes didn't help much in finding Anna (Cummisky) Lynch's Irish county of origin. It would have been easier just to go to ancestry.com in the first place. But the journey wouldn't have been half as interesting.