John Poston of the second generation married Margaret Baldridge, linking the Postons to another mid-Atlantic family with its own traditions and documentary complications. The Baldridge and Holmes family history carried one of the older legends attached to the Poston record: the story of a fabulous British or Irish inheritance. That story mattered less as legal history than as an example of how family memory can preserve names and relationships while distorting events and expectations. In 1766 John Poston and Margaret Baldridge sold the Pennsylvania homestead. That sale marks the decisive turn from the Pennsylvania phase to the southern one. The movement belonged to a larger colonial migration that carried families out of Pennsylvania into the Shenandoah Valley, the Carolina backcountry, and the older districts that would later become modern counties. The Great Philadelphia Wagon Road supplied the broad corridor for that movement. It was not a single family road and not a romantic abstraction. It was the practical route by which many families moved from the mid-Atlantic into the southern interior. The Postons trav-
eled within that stream of migration, carrying a family identity that had already been formed in Pennsylvania. The exact sequence of every stop cannot be reconstructed with equal confidence. North Carolina formed an intermediate stage in the inherited tradition and in the broader geography of movement, but the Pennsylvania Postons did not become the North Carolina Postons of the Maryland-associated line. That distinction later became important when researchers tried to separate similar names across multiple colonies and states. Margaret Baldridge Poston was living when the Pennsylvania land was sold in September 1766. She had died by January 1767, when her father's will was drawn. The narrowness of that interval leaves a permanent silence in the family story. What remains clear is the larger turn. The family had moved out of its Pennsylvania base, and the future of the line now lay in the South.