1. Barclay, R. (1870). Reliquiae Barclaianae: Correspondence of Colonel David Barclay and Robert Barclay of Urie. London: Winter & Bailey. Lithograph.
2. CSPD (1860–1947). Calendar of state papers, domestic series, of the reign of Charles II… (1671 [etc.]), ed. F. H. Blackburne Daniell. London: Longman & Co.
3. Descartes, R. (2015). The passions of the soul and other late philosophical writings. Translated by Michael Moriarty. Oxford: Oxford University Press.
4. Elisabeth of Bohemia (1665). Letter to Theodore Haak. British Library. Add MS 4365, f 196.
5. Greengrass, M., Leslie, M. & Hannon, M. (Eds.) (2013). The Hartlib papers. Published by HRI Online Publications, Sheffield. https://www.hrionline.ac.uk/hartlib.