Proceedings of the Committee on Waste in Working with related correspondence from witnesses included in the printed report, principally mining engineers, colliery managers and mine inspectors., 1866-1870., Adv.MS.51.1.11. 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/16861 Accessed May 22, 2024.