Knowlton also served as a trustee of Colby College and Maine Central Institute , and after the Civil War he worked for the Freedmen 's Bureau in Beaufort , South Carolina .
Knowlton served as trustee of Bates College in Lewiston , Maine .
Knowlton also served as a trustee of Colby College and Maine Central Institute , and after the Civil War Knowlton worked for the Freedmen 's Bureau in Beaufort , South Carolina .
Knowlton served as trustee of Bates College in Lewiston , Maine .