Title to property through long possession, per usucapionem. *Bracton said 'dominion of corporeal things' could be achieved 'by long, continuous and peaceful possession: by time and without livery, but how long that time must be is not specified by law but left to rightly exercised discretion'. He also specified two other paths to possession of corporeal things as being by *livery and title.
Dictionary of Medieval Terms and Phrases. Christopher Coredon with Ann Williams.