Oakley cabin, a slave quarter on the Dorsey/Hutton estate known as Oakley Manor, yielded a rare artifact, here held by Jim 'Sweet Man' Offord. It is a rock crystal owned by Oakley's early slave inhabitants and, like similar ritual stones found in West Africa, believed to be associated with contacting ancestor spirits. Two such crystals were excavated in the 1995 digging season. Foundations of a second slave cabin remain to be excavated. Oakley Manor is now part of the Olney Mill subdivision. The cabin is administered by the Park and Planning Commission.