Friday, August 15, 1862
Four officers went home on sick leave during the week. Major Paul Revere, Captain Henry Tremlett, Adjutant Charles Pierson and Captain Charles Cabot returned home due to illness. Adjutant Peirson and Captain Tremlett never rejoined the regiment; upon regaining health, both obtained commissions to the Thirty-Ninth Massachusetts Regiment.1
1George A. Bruce, The Twentieth Regiment of Massachusetts Volunteer Infantry 1861 - 1865 (Cambridge, Massachusetts: The Riverside Press, 1906), 141-2.