My late father-in-law was adopted by his step-father when he was 10. My late grandmother-in-law never talked about her first husband and there is some confusion on the first husband's surname.
My father-in-law was born in 1934 in Syracuse, New York.
I went to the New York State archives in Albany and got a copy of my father-in-law's birth certificate. The certificate was altered at the time of the adoption and his step-father's name was overwritten with the fact of the date of the adoption.
I've been unsuccessful at finding any documentation on the marriage or on his birth other than the birth certificate. I searched local newspapers.
I have not been able to locate him or his mother in the 1940 census. They were not living with her parents and I can not find her under her maiden name. Without the surname, I do not know how to locate either of them in the census.
Is there any way to find the birth father's surname?
Are adoption records (for New York State for a 1930s birth and 1940s adoption) accessible?