6 (commission signed by John Jay, President of Congress); captain in the Third (Greaton's) Massachusetts regiment, Sept. 29, 1779, to date from Jan. 1, 1777; and again, Sept. 16, 1782, to date from Jan. 1, 1777; and major, March 4, 1783, to date from Oct. 1, 1782.
His several commissions are preserved.
The following sketch of Major Sumner is combined from two manuscript sketches left by his son, with some abridgment:—
On the 21st of April, 1776, the regiments under Colonels Greaton, Patterson, Bond, and Poor were sent, after the evacuation of Boston by the British, to succor the remnants of Montgomery's army, then hard pressed and on their retreat from Canada.
In one of these regiments Sumner was a lieutenant,— healthful, active, and intelligent.
By the invitation of his general officers, Schuyler and Arnold, he was induced to quit for a while his station in the line and enter the flotilla of gunboats, which those generals found it necessary to equip on Lake Champlain.