Folio 3 of the Book of Deer (Leabhar Dhèir) contains a continuation of the Gospel According to St. Matthew and a Scottish Gaelic account of the foundation of the Monastery of Deer by SS. Columba and Drostan.
Colum Cille & Drostán mac Cosgreg a dalta tángator a hÍ mar ro falseg Dia doib gonic’ Abbordoboir, & Bede cruthnec robo mormær Buchan ar a ginn; & ess é ro thidnaig doib in gathraig-sain in saere go bráith ó mormaer & ó thosec. Tángator as a athle-sen in cathraig ele, & do-raten ri Colum Cille sí, iar fa llán do rath Dé. Acus do-rodloeg ar in mormær .i. Bede go-ndas tabrad dó, & ní tharat. Acus ro gab mac dó galar, iar n-ére na glérec, & robo marb act mad bec. Iar sen do-chuid in mormaer d’attac na glérec go ndéndaes ernacde lesin mac go ndísad slánte dó; & do-rat i n-edbairt doib ua Cloic in Tiprat gonice Chloic Pette Mec-Garnait. Do-rónsat i n-ernacde, & tánic slá dó. Iar sen do-rat Collum Cille do Drostán in chadraig-sen, & ro-s benact, & fo-rácaib in mbréther, ge bé tísad ris, ná bad blienec buadacc. Tángator déara Drostán ar scarthain fri Collum Cille. Ro laboir Colum Cille, ‘Bed Déar a anim ó shunn imacc.’
Columba and Drostán son of Coscrach, his disciple, came from Iona, as God guided them, to Aberdour; and Bede the Pict was mormaer of Buchan on their arrival; and it is he who bestowed on them that monastery, in freedom till Doomsday from mormaer and toísech. They came after that to the other monastery, and it pleased Columba, for it was full of the grace of God. And he begged the mormaer, that is, Bede, that he should give it to them, and he did not. And a son of his took a sickness, after the clerics had been refused, and was all but dead. Thereupon the mormaer went to beseech the clerics that they should make a prayer on behalf of the boy, that health might come to him; and he gave to them land as a grant from Cloch in Tiprat as far as Cloch Peitte Meic-Garnait. They made the prayer, and health came to him. Thereupon Columba gave Drostán that monastery, and blessed it, and left the curse that whoever should go against it should not be full of years or of success. Drostán’s tears [déra] came as he was parting from Columba. Columba said, ‘Let Deer be its name from this on.’
Book of Deer.