Looking for ancestors of Judson COOK and Mary Sebastian COOK of Minnesota, circa late 1800's and early 1900's. Their son, Chester Sebastian COOK (b. 05 June 1899), married Clara Marion TRONSTAD (b. 01 September 1900). Chester and Clara's first child, Phyllis Jean COOK, was born 21 January 1921 in Mankato, Minnesota. At that time, Chester was a physical director at the YMCA in Mankato. I believe they lived in Minneapolis prior to that but am not sure.