44th New York Infantry

"The 44th regiment, known as Ellsworth's Avengers, was organized at Albany under the auspices of the Ellsworth association of the State of New York, which planned to raise a memorial regiment to be composed of one man from each town and ward, unmarried, not over 30 years of age or under 5 feet, 8 inches in height, and of military experience. This plan was adhered to as far as possible and two companies from Albany county, two from Erie county, one from Herkimer county, and a large number of scattered squads reported at Albany in response to the request. These companies were mustered into the service of the United States at Albany in Aug. and Sept., 1861, for three years..."
- The Union army: a history of military affairs in the loyal states, 1861-65 (1908)

"Of its first officers, the following had belonged before the war to the famous Chicago. Cadets, part of whom had served with Colonel Ellsworth in the New York Fire Zouave Regiment; Adjt. Edward B. Knox, Captains Larrabee, Conner, and Danks, and Lieut. Harry Kelly. These officers were attracted to the regiment by the fact that it was raised in honor of Ellsworth. Their knowledge and experience were of great value in organizing and disciplining the regiment, and they proved themselves to be excellent officers."
- New York at Gettysburg (1912)

In reserve at Antietam as part of Morell's Division; 2 men slightly wounded at action at Shepherdstown (Boteler's Ford) on September 20th.

Tablet #33: Fifth Army Corps - 15 Sep, 2 PM to 16 Sep, 12 PM
Tablet #18: Morell's Division, Fifth Army Corps - 16 Sep, 12 PM to 17 Sep, 8 AM
Tablet #26: Morell's Division, Fifth Army Corps - 17 Sep, 8 AM to 17 Sep, 2 PM

See more in an exhibit from the NY State Military Museum, source of the quotes above. Eugene Arus Nash's 1910 History is also online.