MasonâÂÂTillett House, also known as Rock Hill, Mason's, Long's Farm, and Brunswick Plantation, is a historic plantation house at Valentines, Brunswick County, Virginia. Built about 1780, it is a T-shaped, two-story frame structure with a -story addition added about 1832. The front facade features a two-story pedimented porch. The interior features exceptional surviving grained and marbleized woodwork. It was listed on the National Register of Historic Places in 2004.