This James F Gibson photograph of June 1862 is from the Library of Congress. Pictured left to right are: Lt. Henry Clay Meinell, Captain Horatio Gates Gibson, Lt. Edmund Pendleton, and Lt. William Duncan Fuller. The first three were together at Antietam in September that year.

Taken in New Orleans in 1867, this photograph was sold by J. Mountain Antiques of Ashburnham, MA. Pictured, left to right, are 1st Lt. Ballard S. Humphrey, Sgt. John B. Charlton (guidon, Battery K), Capt. William Montrose Graham, 2nd Lt. Charles King (son of Gen. Rufus King), 1st Lt. John J. Driscoll.

At Antietam, Humphrey was First Sergeant of Battery I and Graham was Captain of Battery K.

This fascinating map is found in the 1895 Annual Report to stockholders of the New York Central and Hudson River Railroad Company, Horace John Hayden, Second Vice President. It’s online as a PDF from Terry Link on his Canada Southern Railway (once part of Cornelius Vanderbilt’s 19th Century railroad empire) website.

Horace Hayden was two years out of Harvard and First Lieutenant of Battery L, 3rd United States Artillery at Antietam in 1862, but was rubbing shoulders with robber barons twenty years later.