[3] He was elected with the support of the Comyn faction who at that time dominated the minority of the young King Alexander III of Scotland, an election that John I de Balliol initially opposed, with Balliol citing the "ancient liberty of his subjects", i.e. the rights of the Lord of Galloway and the Galwegians.

[6] The sources give contradictory accounts of the consecration, with the Melrose Chronicle stating that it was conducted by Walter de Gray (d. 1 May 1255), whereas the Lanercost Chronicle reported that the consecration, conducted by Walter of Kirkham, the Bishop of Durham, took place on 7 February 1255, at St Agatha's near Richmond.

The techniques employed allowed the researchers to conclude that all the clerics enjoyed a diet of quality meat and fish and probably came from southern Scotland or Cumbria.

[12] Henry's grave also contained "very fine gilded altar vessels, a gold pontifical ring, and the remains of a wooden crozier".

[13] The analysis enable researchers to conclude that Henry had taken a role in rebuilding parts of the priory after it was damaged by soldiers in 1286 and that he had been suffering from tooth abscesses.