He appears as a witness in a charter granted by King David I of Scotland to the community of Deer, recorded in the notitiae in the margins of the Book of Deer.
[2] There certainly was a bishopric of Brechin in 1150, as there exists another charter of King David's, this time granted to the bishop (unnamed) and Céli Dé of Brechin.
[3] It is known that Samson was still bishop in the reign of King Máel Coluim IV (1153–1165),[4] appearing as a witness as late as 1165 in a charter of Richard, Bishop of St.
[5] Samson was a native cleric of Brechin.
[6] This family story probably explains the origins of the Brechin bishopric, that is, the Bishopric of Brechin, like other Scottish bishoprics, had its origins in the older Gaelic Céli Dé monastic community, and perhaps a hereditary ruling family.