A more complete revelation, however, is made to us with regard to the Mormaers of another district, that of Buchan, in the Book of Deer, which contains the usual memoranda of the old grants made to that monastery while still retaining its character as an old Celtic foundation. Here the names of seven of the old Mormaers during the five centuries and a half which elapsed between the foundation of the Celtic monastery in the time of Columcille and the reign of David the First are given. We are told that Bede _Cruthnech_, or the Pict, Mormaer of Buchan, gave the _cathair_ or city _Abbordoboir_, now Aberdour, on the south shore of the Moray Firth, to Columcille and Drostan, and afterwards certain lands called also a _cathair_ or city, to which Columcille gave the name of Dear. He seems to have been followed by Comgall, son of Aeda, who made a grant to Columcille and Drostan. After him we have Matan son of Cearill, Domhnall son of Giric, and Domnall son of Ruadri, but there is nothing to show what the connection of these Mormaers with each other was or when they lived, but the dignity then passes to a family called Mac Dobharcon.[64] Two brothers, Domhnall son of Mac Dobharcon, and Cainneach son of Mac Dobharcon, follow each other as Mormaers, and the latter is succeeded by his son Gartnait, who, with his wife Ete, daughter of Gillemichel, makes a grant in the eighth year of King David, that is, in 1132. The succession among these latter Mormaers seems to follow the same rule of tanistic succession which we have seen among the Mormaers of Moray. [Sidenote: Toisechs of Buchan.]