Dear Mr. Harry; I am a student historian who has devoted a great deal of time and study to the Douglas family. Nannie Douglas was indeed the daughter of Rev. Robert Douglas of Sharpsburg, MD. but her mother was actually Douglas' second wife, Helen Blackford. Helena was the daughter of famed War of 1812 colonel, John Blackford, whose regiment took part in the notorious, if ill fated, Bladdenburg Races. Betwen 1812 and 1814, Blackford built a beautiful home in Washington County, MD, near Sharpsburg, overlooking the Potomac River and Shepherdstown, WV. This home was the centerpiece of a mid-sized plantation called Ferry Hill Place, and it still stands today and is currently being restored by the National Parks Service. Rev. Douglas, who was a preacher for the German Reformed Church in Shepherdstown, was married to Mary Robertson. Mary bore him one child, Henry Kyd Douglas, later of civil war fame. At some point between Henry's birth in 1838 and 1842, Mary died of causes I have yet to determine or pinpoint. Douglas then married Helena Blackford and soon purchased Ferry Hill from Helena's brother who had inherited the place from John Blackford upon his death in 1839. In 1844, they had their first child together, Nannie Cowan Douglas. Nannie was followed by John Douglas (information for whom I have been unable to obtain), and Robert Douglas who died young in 1842 of undocumented causes. If you would care for anymore information, please feel free to e-mail me.