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Painting on white card of two red tulips (not identified in book). (16 x 14.5 cm). Signed 'HCO'. Annotated on reverse 'not used in book'.

Painting on white card of a white tulip with blue centre, labelled 'Ta. Sp. Liwan. Sph.end Persia', 'nat size', (9 x 12 cm). Signed 'HCO'. Annotated on reverse 'not used in book'.

Paintings (watercolour, gouche), hand-coloured photographs and photographs produced in collaboration with scientists at the JI to illustrate colours and genetic variation.

Paintings of Tulipa by E J Collins

Set of 4 watercolour paintings of pairs of tulips showing 2 tulips on a single stem side by side on white card used in 'The Book of the Tulip' (1929) by Sir A Daniel Hall.: 1. Watercolour on white card (23.6 x 14.8 cm) of two tulips, grey/mauve and pink 'Darwin Tulips' as in Plate XVII, p140 in 'The Book of the Tulip' (1929) by Sir A Daniel Hall. Left to right: 'Rev H Ewbank' and 'Suzon'. Signed 'HCO'. nd [c 1929]. Back inscribed with correct tulip names but 'Plate XXI' not XVII as used in book. 2.Watercolour on white card (23.3 x 17.1 cm) of two tulips, red with purple centres, as in Plate XIX, p156 in 'The Book of the Tulip' (1929) by Sir A Daniel Hall. Left to right: 'Isis' and 'Millet'. Signed 'HCO'. Back inscribed with correct tulip names but 'Plate XXII' not XIX as used in book. 3. Watercolour on white card (23.9 x 18.4 cm) of two tulips, purple with yellow centre and red with white centre, as in Plate XV, p124 in 'The Book of the Tulip' (1929) by Sir A Daniel Hall. Left to right: 'Velvet King' and 'Dipper'. Signed 'HCO'. Back inscribed with correct tulip names but 'Plate XX' not XV as used in book. 4.Watercolour on white card (20.6 x 19.0 cm) of two tulips, Broken tulips, stripy 'feathered' purpilish red and white, as in Plate XXIII, p188 in 'The Book of the Tulip' (1929) by Sir A Daniel Hall. Left to right: 'Mabel'' and 'Lady Moyra Cavendish'. Signed 'HCO'. Back inscribed with correct tulip names but 'Plate XXIV' not XXIII as used in book.

Paintings and photographs by H C Osterstock in the Rare Books Room plan chest

Correspondence on tobacco virus.

Paper: 'Agricultural Botany, Interim report on research concerning the breeding system in Vicia Faba' (Jan 1956), Practical Agricultural Botany 2nd year exam paper, notebook: growing and greenhouse notes (1955), University Newspaper the 'King's Courier'', 'King's College, Newcastle in the University of Durham', November 24th 1955, N.I.A.B list of potatoes (1954).

Paper: 'Diffusion' by Roy Markham for 'Methods of Virology', Vol 4 ? (1971)