Of unknown background, he is recorded for the first time in a document dating to 28 November 1365, holding the position of Archdeacon of Dunblane.
[1] Having merely been collated to this position by an ordinary, perhaps the Bishop of Dunblane Walter de Coventre, he received a fresh papal provision on 6 January 1367.
[2] On 1 July 1372 he and all the other bishops of Scotland were ordered by the papacy to collect one tenth of their annual revenue "in aid of the defence of the Pope and the Roman Church in Italy".
Pope Gregory XI wrote to Bishop Andrew in 1375 requesting that the Bishop furnish Thomas Stewart and his brother James Stewart, illegitimate sons of King Robert II of Scotland, with benefices and to issue a dispensation for their legitimacy.
[4] Bishop Andrew's seal survives appended to the Act made at Scone on 4 April 1373, settling the succession of the Scottish crown.