Volume containing for the most part plates for ‘Thermography’ by John Francis Campbell, along with experiments, drawings and notes concerning the solar spectrum., 1883, or before., Adv.MS.50.6.19. 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/16847 Accessed April 24, 2024.