Wasp Study Pen and ink | 1965
Floral Study Pen ink watercolour | 1968
Charolais Bull Pencil | 1973
Wasp Study Pen and ink | 1975
Stag Beetle Study Pencil | 1975
Snail Study Pencil | 1975
Grasshopper pen and ink | 1975
Vultures Pen and ink | 1984
Stag Beetle Pencil | 1984
Butterfly Study pen and ink | 1985
Butterfly Study pen and ink | 1986
Grasshopper pen and ink | 1986