Daniel J. O’Brien age 20 years. Enlisted at New York City, to serve three years, and mustered in as
private, Company H, on October 3, 1861. Wounded in action on September 17, 1862. He died of his
wounds on December 16, 1862, at Frederick, Md.
MSHWR “Secondary amputation in the upper third of the right femur for shot fracture, flap method,
by Surg. H. S. Hewit, U. S. V., on December 5, 1862. Died on December 16, 1862, exhaustion. Autop.
Army Medical Museum Specimens # 755, and # 1101.”
Daniel J. O’Brien is buried in Saint John’s Cemetery, Fredrick, Maryland. An entry in “Dedication
Remembrance Service Civil War Monuments & Markers Saint John’s Cemetery Sunday, July 19th, 1998” reads as follows: O’Brien, Pvt Daniel J. 69 NY Co. H Enlisted aged 20, October 3, 1861, New
York City, N.Y., for three years. Mustered October 3, 1861, New York City, NY. Attached March,
1862, Pioneer Corps of Regt. Wounded September 17, 1862, Antietam, Md. GSW right thigh. Died
December 16, 1862. USA General Hospital Amputated right thigh. Buried Saint John’s Cemetery,
December 18, 1862. Parents: Timothy & Johannah O’Brien Tipperary, Ireland.
69 NY clippings Daniel J. O’Brien Company H thigh, severely.
Pension record: Mother, filed January 17, 1863

Daniel J O'Brien