Born in Philadelphia,[2] Clark was one of four sons of Enoch White Clark (1802–1856), who founded the financial firm E. W. Clark & Co. in Philadelphia in 1837. By mid-century, Enoch Clark had become one of the city's 25 millionaires,[3] launching his family into social prominence.
Upon the outbreak of the Civil War, Clark hastened to fight for the Union side. He joined the Commonwealth Artillery as a private in the spring of 1861, then accepted a commission in the 6th Pennsylvania Cavalry, another organization of the elite and one that distinguished itself in battle. ("The Sixth Pennsylvania Cavalry, also known as Rush’s Lancers, was a completely volunteer unit and one of the finest regiments to serve in the Civil War. Tracing their history from George Washington’s personal body guard during the Revolutionary War, many of the men of the Sixth Pennsylvania were the cream of Philadelphia society...," wrote historian Eric J. Wittenberg.[5]) Clark was mustered in on October 4, 1861, as Second Lieutenant of Company F. The following April 19, he was promoted to First Lieutenant of Company K, and then on March 16, 1863, to Captain of Company M. He led his unit in combat at the Battle of Gettysburg.[6] Later, he and his men fought at the Battle of Trevilian Station (June 11–12, 1864), where on the first day they helped "to drive the rebels from the railway cut and a brick kiln, behind which they had entrenched themselves." On the second day of the battle, Clark was taken "seriously ill", and relinquished command of his unit to Captain (and future famed architect) Frank Furness, whose actions that day were years later recognized with the Medal of Honor.[7] Clark was transferred to Company C on September 18, 1864, and mustered out the following day.[8] On March 13, 1865, he was brevetted a major of the U.S. Volunteers "for gallant and meritorious services at the battle of Gettysburg" and lieutenant colonel "for gallant and meritorious services in the campaign from the Rapidan to the James."[9]
^ abcThayer, William Roscoe; William Richards Castle; Mark Antony De Wolfe Howe; Arthur Stanwood Pier; Bernard Augustine De Voto; Theodore Morrison (March 1913). "Necrology". The Harvard Graduates' Magazine. 578.
^Vitiello, Dominic; George E. Thomas (2010). The Philadelphia Stock Exchange and the City It Made. Philadelphia: University of Pennsylvania Press. p. 93. ISBN978-0812242249. Retrieved December 8, 2010. There is obviously some confusion by the source; Clark died in 1856. But the passage was directly about fellow financier Francis Drexel.
^"Elections in 1859". Proceedings of the Academy of Natural Sciences of Philadelphia. 11: 354–355. 1859. JSTOR4059277.
^Wittenberg, Eric J. (2007). "Rush's Lancers". Archived from the original on October 4, 2013. Retrieved October 2, 2013.
^Pennsylvania. Gettysburg Battle-field Commission, Paul L. Roy (1914). Pennsylvania at Gettysburg. W.S. Ray, State Printer. pp. 853.
^"E.W. Clark & Co". United States Investor. 25 (27–52): 2013–14 (43–44). 1914.
^"Col. J. Hinckley Clark", in "Return of a Death in the City of Philadelphia" ("Physician's Certificate" and "Undertaker's Certificate in Relation to Deceased"). Philadelphia, Pennsylvania: Philadelphia City Archives (death records).