John Hungerford Pollen, Papal Negotiations with Mary, Queen of Scots: during her reign in Scotland 1561-1567 (1901), pp. lii–lvi; archive.org.
John Dowden, John Maitland Thomson (editor), The Bishops of Scotland: being notes on the lives of all the bishops, under each of the sees, prior to the reformation (1912), p. 94; archive.org.