Kelly resumed his role as colonel of his regiment as more senior officers returned to the brigade. However, with the death of Col. Richard Byrnes at the Battle of Cold Harbor in 1864, Kelly again commanded the brigade. At the age of 42, Kelly died during the Siege of Petersburg when he was shot through the head while leading the Irish Brigade forward against Confederate earthworks. His body was recovered and sent back to New York for his funeral. He was buried in First Calvary Cemetery in Woodside, New York.
References
^"Faithful to us here..." A Remembrance of Colonel Patrick Kelly, by T.L. Murphy
Bilby, Joseph G., The Irish Brigade in the Civil War: The 69th New York and Other Irish Regiments of the Army of the Potomac. Conshohocken, Pennsylvania: Combined Books, 1998. ISBN0-938289-97-7.
Busey, John W., and Martin, David G., Regimental Strengths and Losses at Gettysburg, 4th Ed., Longstreet House, 2005, ISBN0-944413-67-6.
Jorgensen, Jay, Gettysburg's Bloody Wheatfield, Shippensberg, PA: White Mane Publishing, 2002, ISBN978-1-57249-360-5.
Pritchard, Russ A., The Irish Brigade: A Pictorial History of the Famed Civil War Fighters. New York: Running Press Book Publishers, 2004. ISBN0-7624-2009-X.
U.S. War Department, The War of the Rebellion: a Compilation of the Official Records of the Union and Confederate Armies, U.S. Government Printing Office, 1880–1901.