Small, John. “Sketches of Later Scottish Alchemists: – John Napier of Merchiston – Robert Napier – Sir David Lindsay – First Earl of Balcarres – Patrick Ruthven – Alexander Seton – and Patrick Scot”. Proceedings of the Society of Antiquaries of Scotland, vol. 11, Nov. 1876, pp. 410-38, doi:10.9750/PSAS.011.410.438.