Liberton parish consisted of  of land, and it is likely that Máel Bethad owned the upper part of the parish. Máel Bethad's name occurs as a witness on many of King David's charters, where it is rendered in a number of corrupt forms, e.g.
Liberton parish comprised an area of land, and it is probable that Máel Bethad controlled the upper part of the parish. Máel Bethad's name appears as a witness on numerous charters issued by King David, often in various incorrect spellings, such as: