14. 56; Baker vy. Wich, 1 Salk. 56. Tenure in ancient demesne may be leaded in abatement to an action of ejectment. ust v. Roe. 2 Burr. 1046. Also a species of copyhold, which differs, however, from common copyholds in certain privileges, but yet must be conveyed by surrender, according to the custom of the manor. There are three sorts: Where the lands are held freely bv the king’s grant; (2).customary freeholds, which are held of a manor in ancient demesne, but not at the lord’s will, although they are conveyed by surrender, or deed and admittance; (3) lands held by copy of court-roll at the lord’s will. denominated conyholds of base tenure.—Ancient house. One which has stood long enough to acquire an easement of support against the adjoining land or building. 3 Kent, Comm. 437: 2 Washb. Real Prop. 74. 76. In England this term is applied to houses or buildings erected before the time of legal memory, (Cooke, Incl.