`Report of the Commissioners appointed to inquire into the several matters relating to coal in the United Kingdom. Vol. II. General minutes and proceedings of committees A., B., C., D., etc.`., 1871, 1872., Adv.MS.51.1.2. 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/16921 Accessed April 23, 2024.