Diagrams and notes of John Francis Campbell relating to experiments in thermography made, according to the note on the front board, between May 1880 and May 1881 with a new lens he had acquired., 1880-1881., Adv.MS.50.7.2. 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/16849 Accessed April 25, 2024.