adverse possession alodium burgage claim colony de facto de jure dependency derivative title fee fief fee simple fee simple absolute fee simple conditional fee simple defeasible fee simple determinable fee tail feodum feud fiefdom frankalmoign free socage freehold gavelkind having title to hold holding knight service lay fee lease leasehold legal claim legal possession mandate occupancy occupation original title owning possessing possession preoccupancy preoccupation prepossession prescription property property rights proprietary rights seisin socage squatting sublease tenancy tenantry tenure tenure in chivalry title underlease undertenancy usucapion villein socage villeinhold villenage