Often self-seeking persons will intrude into lands and tenements legitimately bequeathed to others, claiming to have a hereditary (or some other) right to those properties. The executor of the testament may introduce a plea of hamsoken by gage and pledge, to have the tenement seized into the king's hand and the intruder attached to answer in court on an assigned day. At which day the testament referring to the tenement is to be produced in court. If the intruder cannot show reason for putting aside the testament, the court may delivered the seized tenement to the executor to carry out the last will of the testator, and the intruder is to be heavily amerced for trespass and is to pay damages.
[Procedure in a plea of hamsoken is dealt with in cap.17. This would appear to be a special application of that, focused around the legitimacy of the will and testament.]