The Supreme Judicial Court of the Commonwealth of Massachusetts has reaffirmed the old rule that property rights can be expanded by slow accretion or diminished through slow erosion when property is located on a stream or the ocean. In White v. Hartigan, 982 N.E.2d 1115 (Mass. 2013), beachfront owners claimed a right to use the beach behind their neighbors house because their deed had given them rights to the beach in 1841. The court disagreed, noting that changing boundaries had placed the plaintiffs' beach under water and that they had no right to "moveable" boundaries ensuring access to the beach behind their neighbor's house.