Archives of the Royal Scottish Society of Arts, consisting of incoming correspondence, lectures and papers read to the Society; including the original manuscript, 1871, of the essay of Robert Louis Stevenson, 'Intermittent Lights'., Acc.4534/1-183. National Library of Scotland Archives and Manuscripts Division. https://manuscripts.nls.uk/repositories/2/resources/7630 Accessed May 07, 2024.