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•1 Box containing 4 ledgers (transferred to folders) of lists of identifications of plant material and pathologies made by Orr between 1925 and 1952.

•Memo book titled ‘Agarics: New Records and Observations’ (1938), from Dr. Roy Watling through Alan Bennell

Copy of a letter from J.H. Balfour to the Secretary of the Botanical Society (10.02.1841)

•File containing 3 collectors books, No. 1-300

•Large case marked ‘Orchids’ c.1840

•Letter and exchange request / book plate c.1890? French collector looking to exchange books? Reference to an Ex-Libris Society. Reaux based at 26 Rue des Dames, Paris. Letter and Card found in RBGE copy of Matthioli’s ‘De Plantis Epitome Utilissima’ 1586 [belonged to John Hope, so presumably not received by exchange with Reaux]

•Letter from Richardson to unknown 2 Sep 1841, describing a meeting of the British Association regarding a grant for preparing maps for illustration of the geographical distribution of plants & animals, which had lapsed, due to inconsistencies

•Note of plants found in Ross-shire by Dr. John Robertson (14 Jul1847)

GB 235 ARM/1 - Lecture on 'Stimulation of Plant Growth' given at 3pm on the 5th March 1912 to the Royal Horticultural Society, Vincent Square, Westminster, this is a typescript from shorthand notes taken by Mr. C.E. Barnett of Grecian Chambers, Devereux Court, W.C. London. These are notes of a lecture on how plants are stimulated to grow, with practical demonstrations.
GB 235 ARM/2 - Lecture on 'Enzymes in Relation to Plant Growth' given on the 3rd June 1921 at King's College, Cambridge. Consists of two lectures on the same subject with demonstrations, slides and blackboard formulae, covering enzymes, their definitions and how they are believed to interact to promote plant growth.