[1] Arnot was Rector of Kirkforthar, Fife, receiving crown presentation to that parish church on 19 September 1497.

[4] After the death of Henry Abercrombie, Abbot of Cambuskenneth, on 29 March 1503, Arnot was provided to succeed him.

[6] He was provided to the bishopric on 29 January 1509, and granted the temporalities of the see on 27 May as "Bishop of Candida Casa [Whithorn] and of the Chapel Royal".

[1] Arnot resigned his bishopric on 23/4 January 1526, to Henry Wemyss, with right of return and for a pension.

[12] Although Arnot also resigned Tongland for lifelong pension with right of return on vacancy, Arnot may have effectively held on to Tongland for a few more years; repeated crown nominations of Wemyss to Tongland failed, apparently because of Arnot, while William Stewart, a secular canon of Glasgow Cathedral, also got crown nomination until the Pope finally agreed to give Wemyss the commend in 1530, with Stewart resigning his rights.