[1] When the chair of mathematics became vacant in the University of St. Andrews in 1807, Haldane was appointed to the professorship, and resigned his charge at Drummelzier on 2 October 1809.

He remained in the post until 1820, when he was promoted by the crown to the pastoral charge of St. Andrews parish, vacant by the death of Principal George Hill.

His predecessor had held the principalship of St. Mary's College in St. Andrews in conjunction with his ministerial office, and the same arrangement was followed in the case of Haldane, who was admitted on 28 September 1820.

He was elected a Fellow of the Royal Society of Edinburgh in 1820, his proposers being George Dunbar, Robert Jameson, Alexander Brunton and Patrick Neill.

The grave lies on the north wall just left of the distinctive white military memorial to Lt Col Sir Hugh Lyon Playfair.