The Bishop had given to his diocese of Caithness[5] the Constitution which is still extant at Dunrobin. This Constitution, like that of Elgin, was in the main based on that of Lincoln. But the Bishop was to be _Primus_ and above all other dignitaries of the Cathedral. For it was ordained that instead of the one priest who had previously officiated, there should be ten Canons with the Bishop as their head, five of them holding the dignities of Dean, Precentor, Chancellor, Treasurer, and Archdeacon, each of them during residence to minister there daily, as well as the Abbot of Scone, who was a Canon, but had a Vicar to perform his duties in his absence. The teinds (or tithes) of certain parishes were allocated to each member of the Chapter; and lands, residences, and prebends were assigned to them, provision also being made from the teinds of other parishes for the lighting and services of the Church. Bishop Gilbert built and completed the Cathedral, making, it is said, the glass for its windows at Sidera, from sand taken from near the howe of the first Jarl Sigurd, a worshipper of Odin.[6] Bishop Gilbert had also translated the Psalms into Gaelic; and, having set his diocese of Caithness, comprising the modern counties of Sutherland and Caithness, in good working order, and having re-buried his predecessor Adam, with a stately funeral, at Dornoch in 1239, had made his will in 1242, and died in the episcopal palace at Scrabster, near Thurso, in 1245. It was probably during his episcopate that King Alexander II gave his open letter,[7] directed to the sheriffs, bailies, and other good men of Moray and Caithness, and enjoining them to protect the ship of the Abbot and Convent of Scone and their men and goods from injury, molestation or damage in their journeys to the north. Bishop Gilbert was buried at Dornoch, and was succeeded by Bishop William,[8] and he in his turn, in 1261, by Bishop Walter de Baltroddi, who doubtless suffered from King Hakon's fines levied in Caithness in 1263, and whose daughter the Chief of the Mackays is said to have married after that date. In 1261 the Hebrides had been harried by William, MacFerchar, Earl of Ross and uncle of Freskin de Moravia the younger, with great cruelty and barbarity, and King Hakon in 1263 began to collect and equip a fleet with a view to revenging the injury done to his subjects in the west.[9] In the preparation for this in the spring of 1263, we find Jon Langlifson, whose mother Langlif was Harold Maddadson's youngest daughter, and who was thus himself a nephew of Earl John, sent over with Henry Skot to Shetland to obtain pilots for King Hakon,[10] while Dougal of the Isles met them in Orkney, and was let into the secret of Hakon's intended expedition.