Found her on the 1915 Claverack, Columbia, New York state census (A.D.1 E.D.2 img 2) as Mary A. Clapper
age 65. She is living with her widowed mother Mary J. Finger
See her on the 1850 Clermont, NY Census
Found her on the 1860 Claverack, Columbia, New York census (img 45) age 11.
Found her on the 1870 Claverack, Columbia, New York census (img 4) age 21, living at home.
Found her on the 1880 Bloomfield, Essex, New Jersey census (dist 93 img 34) as Mary A. Clapper
Found her on the 1900 Easton Ward 8, Northampton, Pennsylvania census (dist 133 img 22) as Mary E. Clapper
age 51. Has given birth to 2 children, 1 is living.
Found her on the 1920 Ancram, Columbia, New York census (dist 1 img 3) as Mary A. Clapper
age 71, widow. She is living with her sister, Susan S. Snyder
The death of Mrs. Mary A. Clapper, a resident of the Home for the Aged in this city, occurred at the Home this morning where she had been residing for the past eleven years. She was the widow of Lyman Clapper. Mrs. Clapper was bom in Greenport, the daughter of the late Jonas and Mary Jane Odell Fingar. She had spent most of her life in Hudson where she was known and liked by a host of friends who will regret to learn of her death. She was a member or the First Baptist church of this city. There are no immediate survivors. - Obituary Hudson Evening Register February, 1941