24 June 1782
Major Matthew Clarkson commenced his military Services as a Volunteer early in the present War. In the Year 1777 he received a Majority in the Army of the United States, and was present at the Surrender of Lieut. General Burgoyne at Saratoga, having been active in all the principal antecedent Engagements, which produced that Event—In the Year 1779 was appointed Aide de Camp to Major General Lincoln (now Secretary at War) then commanding Officer in the Southern Department, & in that Character served at the Siege of Savannah. In 1780 he acted as Major of a Corps of Light Infantry during the Siege of Charles-Town. In 1782 He returned to his former Situation as Aide de Camp to Major General Lincoln, and was present at the Reduction of the British Posts of York and Gloucester under the Command of Lieut. General Earl Cornwallis. Soon after this, when Major General Lincoln became Secretary at War, he was appointed his Assistant. In all which Stations, from my own Knowledge and the Reports of the General Officer under whose immediate Orders he has served, I am authorised to declare that He has acquitted himself with great Honour. Given under my Hand And Seal at the Head-Quarters of the American Army the twenty-fourth Day of June in the Year 1782.