They were divorced in 1870. Although Richard has not been found in the census for that year or any subsequent year, in the 1870 U.S. Census for Marine, Washington County, Minnesota Mary and her daughters were enumerated with the family of her father, Villeroy B. Barnum, as follows:
Dwelling #227; Family #227
Barnum, V. B.; 59; M; W; Farming; Real property $3,000; Personal property $1,320; b. Connecticut; Male citizen of U.S. of 21 years of age and upwards
Barnum, Nancy; 57; F; W; Keeping house; b. New York
McLagan, Mary; 34; F; W; At home, b. Ohio
Cruett, Julia [N.B., probably s/b Clewett]; 16; F; W; Domestic; b. Minnesota; Attended school during the year
McLagan, Olive; 14; F; W; At home; b. Minnesota; Attended school during the year
McLagan, Georgia; 11; F; W; At home; b. Minnesota; Attended school during the year
Bidbury, John; 24; M; W; Work on farm; b. England; Both parents of foreign birth; Male citizen of U.S. of 21 years of age and upwards