• Bound ms. notebook containing 64 lectures on botany, topics for weekly examinations, with 13 loose ms. sheets, principally plant lists, 1868–1877
• Flora of Edinburgh, by John Hutton Balfour, assisted by John Sadler, Edinburgh: Adam and Charles Black, 1863, with ms. corrections and annotations (title page changed to “Second Edition, 1871”; front cover label = “Flora of Edinburgh / Third Edition / Additions and Corrections”).
• Reprints of articles on Scottish flora, principally from Trans. Bot. Soc., including “Mr Sadler on the Flora of the Bridge of Earn,” 1862; “Mr Sadler’s Remarks on Boehmetria nivea,” 1870; Mr Sadler’s Report on Open-Air Vegetation,” 1879;” Notes on the Alpine Flora of Ben Nevis, Inverness-Shire,” 1879; “On the Flowering of Yucca gloriosa, L., in the Royal Botanic Garden, Edinburgh,”1880 (ms. inscription: “With J. Sadler’s Compts”); “On a Curious Form of Kohl Rabi,” 1880; Report on Notes on a Botanical Trip to Ben Nevis, Inverness-Shire, in July, 1876, by John Sadler, reprinted from the Gardeners’ Chronicle, March 17, 1877, 2 copies, 1 with ms. annotations and corrections; notice of publication of Gardiner’s [sic] Flora of Forfarshire, 2nd edition by John Sadler (1872); 4 reports on temperatures at the Royal Botanic Garden, Edinburgh, 1880–1882; copies of 2 letters regarding the appointment of a new Curator for the RBG (originals in “Balfour, J.H.”, supp. boxes under “Nicholson, G.”), 1878.
• Obituaries of John Sadler, including “John Sadler,” by Professor Bayley Balfour, Trans. Bot. Soc., 1883 (with typescript); “The Late Mr John Sadler,” by William Craig, reprinted from Berkshire Naturalists’ Club Transactions, 1882 (with typescript); typescript of notice in Gardeners’ Chronicle, July–Dec. 1882; typescript of entry in A Biographical Index of British and Irish; newspaper clippings of obituary; ms. letter from William Craig to “My dear Professor” [I. Bayley Balfour] regarding Sadler’s supposed sojourn in Bristol, 1905; ms. of “medallion” on Sadler’s tombstone (Warriston Cemetery, Edinburgh), which was erected “in affectionate remembrance by his friends in the Scottish Alpine Botanical Club,” 1884.
• Caricature: ink and watercolour drawing of 3 mycologists flying high in a mushroom-shaped hot air balloon. Inscribed: “Authorities high in fungi. 1872” in John Sadler’s handwriting.
• Index card: Sadler, John. 3 ltrs 1879/80 filed “Balfour, I.B.” papers under “Sadler, J.”
