Hello - my mother's family is from Phelps Co., MO, and my husband's family is from nw Arkansas, so I know the area you are researching. I descend from Earp from Kentucky to Phelps, MO. Are you aware some of the Harp were Earp? Some of these lived in the Rockhouse area south of Eureka Springs, Arkansas almost on the Madison County line, and they may be related to some of my other lines. I have several lines of Brown, and Melton were related by marriage.