James Murrow(sic) sold 2 Aug 1779 to John Cample, SANDY BRANCH, "Addition," 20 acres.[Deed Book L no.11 & M no.12 f.273, p168 in F. Edward Wright's Sussex County Land Records: 1769-1782, n.b.,he abstracts above as James Murray] 

This deed proves that the area was called SANDY BRANCH as early as 1779.