Correspondence of John Francis Campbell in the capacity of Secretary to the Royal Coal Commission in London, a post he held for several years, along with various printed reports and proceedings of the Coal Commission concerning investigations made into a number of aspects of coal mining throughout the country., 1866-1871., Adv.MSS.51.1.1-51.1.14. Correspondence and papers, including many manuscripts in Gaelic, journals and yearbooks (with many photographs), albums of watercolour paintings and sketches, and experimental notebooks, of John Francis Campbell of Islay (1821-1885), Gaelic scholar and collector of oral tradition, traveller, scientist, official of the royal household and public servant., Adv.MSS.50.1.1-51.2.7. National Library of Scotland Archives and Manuscripts Division. https://manuscripts.nls.uk/repositories/2/archival_objects/16766 Accessed April 18, 2024.