I am unfamiliar with "The Saints of Broadalbin".Was it a publication pertaining to Ohio settlers who went West from NY?
I saw your Emery Brewer in the 1870 U.S. Census for Grand Prarie TWP, Marion Co., OH, which lists him as being born in NY.
Interesting what appears in the 1880 U.S. Census, though, for his widow Cynthia - even though she was born in OH in 1831, her father was born in RI and her mother was born in NY.Also, do you know who the Matilda Brewer is that is living with Cynthia's household in 1880 right after your Emery's death?Could it be an older sister-in-law?Whoever this Matilda Brewer is, she was born in NY in 1822, and both her parents were born in RI.The coincidence here with my ancestor Russel Brewer is that would make Matilda about the same age as Russel's oldest child (Daniel born in 1826), and in the late 1700's many people from Rhode Island re-settled in the Broadalbin, NY area (including my Russel Brewer's mother, according to the 1880 U.S. Census for Edinburg, NY - across the river from Broadalbin).
Many of the answers to questions on the Broadalbin Brewer's would most probably be found in the old Montgomery County archives located in present-day Fonda, NY [although Fonda, NY is in present-day Herkimer County, both Herkimer Co. (in 1791) & Fulton Co. (in 1830) were formed from Montgomery County].Next time I travel from Maine to visit my relatives in that area of NYS, I hope to make a side-trip to Fonda to do alittle research.
This message has more questions than answers, but researching this side of the family may take some time.