Frank Stringfellow (c. 1840 – June 8, 1913) was a Confederate officer and spy who survived the American Civil War, and married the sweetheart for whom he repeatedly risked his life to court – Emma Green.

Stringfellow also rode with Colonel John Singleton Mosby of the 43rd Virginia Cavalry, most notably in the raid at Loudoun Heights on January 9, 1864.

[6] Stringfellow posed as a dental assistant in Alexandria, Virginia and gathered intelligence, and later even obtained a dental license and did the same in Washington, D.C.[7] Unlike the plot line of the PBS drama Mercy Street, there is no evidence that Stringfellow was involved in any attempt on the life of President Abraham Lincoln.

Stringfellow led the campaign that built Christ Episcopal Church in Martinsville in the 1890s, but moved on soon after the building was finished.

[10] He considered ministry among fellow Confederate veterans as his mission, and often regaled audiences with stories about his military escapades.

[13] Stringfellow was one of the characters in a PBS historical drama entitled Mercy Street and was played by Jack Falahee.