This Mary Pamplin - Carrington "might" be a daughter of John Pamplin, Jr. who was born 1711 or earlier in King & Queen Co., VA. We have no info on RP, Jr.'s descendants. We do have record of him in Lunenburg Co., via an Order Book entry dated June of 1756. We also have him in Halifax Co. on 19 Nov. 1778 buying 100 acres. Then on 11 Feb. 1789, he sold the same 100 acres and was referred to as Robert Pamplin of Rockingham Co. "North Carolina".
Is Rockingham Co. near where Mary died? Have you searched land deeds and will records in NC for Pamplins?