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 red tulip labelled 'Tulipa Slapfii'. Single red flower, no leaves. 8.5 x 10.5 cm. Signed 'HCO'. Annotated on reverse "not used in book'.
Painting on white card of a single red tulip, unidentified, (14 x 13 cm). Signed 'HCO'.. Annotated on reverse 'not used in book'.
Paintings (watercolour?) of plums on board (44.5 x 35.5 cm): 18 watercolours of plums on individual white card pasted to cream board (each approx. 4.5 x 8 cm), entitled (bottom, middle) 'Seedlings from Prunus Domestica, var. Victoria, selfed'. Top row: top left: two black plums on a leafed branch labelled ''Prunus spinosa 2n=32'; top middle: one apricot coloured plum labelled 'Prunus Domestica var. Victoria, 2n =48'; top right: two plums; one yellow and one purple, labelled 'Prunus Duaricata 2n +16'. Below these are three rows of five individual plums in a variety of colours (red, orange, yellow, green, black and purple) numbered from left to right: top row: 36, 35, 46, 358, 23; midd. row: 5, 143, 35, 186, 71; bott. row: 217, 81, 23, 10, 144. Published in: MB Crane 'Cultivated plants of the past, present, and future', in Endeavour 2 (1943).
Watercolour painting of Tulipa Kaufmanniana 'Brilliant': 3 tulip flowers painted on white card, in shades of yellow and pink, signed HCO. Used in The Book of the Tulip (1929) by Sir A Daniel Hall, Plate XI
Painting of three studies of tulips, signed HCO, framed and mounted: these are copies of paintings by Sebastian Schedel (1570-1628), Pierre Joseph Buchoz (1731-1807) and Jacob van Walscapelle (1644-1727). Back reads: 'Plate XIX of Old Garden Tulips. Left - from a drawing in Schedel Calendarium, 1610 (Kew Library); Middle -Semper Augustus from Buchoz, 1781; Right - from a picture by Walscapelle, c.1700 in the National Gallery'. Framed by Leveton & Sons, Norwich, No. 131 280.
Painting of three Rhododendron flowers on a black background by H C Osterstock, mounted on grey green card, unsigned, 26 x 11 cm, c.1930s.
Painting of John Innes (Founder), signed 'H C Osterstock, 1934', 59 x 45.5 cm, with loose label 'John Innes 1829-1904 Founder'. Painted from photograph (Drawer 4, RBR).
Painting (original) of Arabidopsis thaliana by Toni Hayden, 1995. Commissioned by Mike Bevan. Frame by Orford Frames, Red Lion Street, Norwich.
Painting of a white flower (tulip?) with blue centre on single long stem, three leaves, white background signed 'HCO', framed and mounted, 28 x 24 cm, c. 1930s. Framed by J Hill, Holt, Norfolk.