The 1880 census lists her as 1 yr of age, her father Merritt was 44, her other Irene was 30...Year: 1880; Census Place: Morris, Otsego, New York; Roll: 916; Family History Film: 1254916; Page: 253B; Enumeration District: 107; Image: 0161. 
The 1900 NY census Merrill Matteson 63 NY Irene E Matteson 50 CT Alice M Matteson 21 NY and aunt Martha Walling 80 b Oct 1819 Rhode Island.
Year: 1900; Census Place: Morris, Otsego, New York; Roll: T623_1145; Page: 2A; Enumeration District: 125.
FindaGrave lists (incl obit) : Name: Alice Mae Stafford Maiden Name: Matteson Birth Date:1 Feb 1879 Birth Place: Morris, Otsego County, New York, Death Date: 10 Oct 1956 Death Place: Oneonta, Otsego County, New York, United States of America Cemetery: Hillington Cemetery Burial or Cremation Place: Morris, Otsego County, 
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It may be possible to confirm family relationships with Alice by comparing test results with other carriers of her mitochondrial DNA.
However, there are no known mtDNA test-takers in her direct maternal line.
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Alice: