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Sir Alfred Daniel Hall: correspondence and research (mainly about Tulips): photographs, manuscripts and proof papers, notes, notebooks, correspondence, pressed petals, drawings and paintings.

Alnarps Tradgardar 1927 - 1928

Alpine and Herbaceous Plant and Ornamental Tree and Shrub Catalogue, George G Whitelegg, The Nurseries, Chistlehurst, Kent

Alpine and Perennial Plants, Seedlist 1933, Floraire, Establissement Horticole et Jardin Alpin d'Acclimatation, Chene-Bourg pres Geneve, Switzerland

Alpines, Trees & Flowering Shrubs, Herbaceous Plants 1938, Brookside Nurseries Ltd, Headington, Oxford

; Author: Butler, Samuel; Publication Place: London; Publisher: David Bogue

Photographs: Alternaria x 3, 1980; Chocolate Spot (Botrytis) x 1 1968.

Letter to Bateson informing him of his election to membership of the Association's Committee on Theoretical Research in Heredity, 1906; copies of reports by the Committee and other papers.