The Rappahannock County , Virginia is not even close as it heads toward the Warren County Virginia intersecting line . State route # 632 at the point of it's intersection with State route 634 ( Withers Mill Road --- not Withers Road )has no right turn at that point . That right turn shown on your map was abandoned by Virginia back around 1922 ) The Rappahannock County line literally follows the middle of the Rappahannock River up to a point where a 90 degree turn toward the west would take the county line "straight" up to the intersecting point in the Warren County line .The reason I know this is that I own that literal 90 degree corner and that line is straight up my east to west property line .  Mac McGrail