Born in Stowe, enlisted as a sharpshooter, Oct. 30, '61, mustered in the 2d Regiment, U.S. Sharpshooters, Co. E. Nov. 9, '61, at West Randolph, and entered on duty with his regiment, serving in all its battles, 'till at the Battle of Antietam, Sept 16, '62, he was hit by a ball a little above the right knee cutting an artery, and causing a rapid flow of blood. Taking his handkerchief he bound it up so as able to go a short distance, but fell upon the field, where the various tides of the battle left him among friends and foes alternately, in the excitement receiving help from none; after a few hours was removed to a bed of straw on the ground near by, remaining 'till the next day without food or drink, when his wound was dressed; 5 days after sent to Washington, remained there 'till the 2d of Dec; sent to Burlington, returned to his regiment the first of March, '63, and followed its fortunes through the campaign of '63, when, not disheartened by the bloody scenes through which he had passed, he re-enlisted Dec. 21,'63, for another term of service. Starting in the campaign of '64, in the advance toward Richmond, he fought in the first four battles of his company, but at Cold Harbor, June 3d, while skirmishing, was again hit by a ball from a rebel sharpshooter in the right knee-joint, was carried to White House, where his wounds were dressed, and the 11th, sent to King St. Hospital, Alexandria, where he died June 21,'64, aged 20 years.
--Hemenway's Historical Gazetteer, 1871, ii:761
In King Street Hospital, Alexandria, June 1st, Asa J. Sanborn, Co. E. U.S.S.S., from Stowe, aged 19 years. He had re-enlisted after nearly serving out his first term of enlistment
--Lamoille County Newsdealer: Aug. 3, 1864