Tuesday, December 3, 1861
Captain Caspar Crowninshield of Company D resigned from the regiment to accept a commission as captain in the First Massachusetts Cavalry, much to the regret of his fellow officers. First Lieutenant Norwood P. Hallowell was promoted to captain in his place. Second Lieutenant Charles Whittier was promoted to First Lieutenant, and new recruit Henry Ropes, scheduled to join on December 31, was commissioned Second Lieutenant.1
1George A. Bruce, The Twentieth Regiment of Massachusetts Volunteer Infantry 1861 - 1865 (Cambridge, Massachusetts: The Riverside Press, 1906), 72.