I see after their marriage that John, Martha and daughter Mary were in Lafayette County Ms in 1860.
Were John Dunlap's parents John (b. circa 1800 NC) and Frances (b. circa 1791, Ga.) Dunlap of 1860 Lafayette Co.? It appeared John's younger brother Joseph (b. 1842) was in his parents' HH.
In 1850 Lafayette Co. the memebrs of the HH were listed as "J", Frances, Martha C, John and Josiah.
It also appeared that in 1850 and not far from the Dunlap HH that Martha Hyde was listed in the HH of "W" and Elizabeth Hyde.