Based on census research and information provided by Evelyn Cawelti, I beleive the Mary M. Cawelti was Alberts Aunt. Mary M. was the sister of Johannes George Cawelti (George Cawelti) who farmed in Chisckasaw County. She married Andrew Larson who also farmed nearby.
Based on the 1880 census I beleive Albert had another brother named George. The 1880 census has him as age 9.
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