A RARE GROUP OF FOUR EARLY WATERCOLOURS OF AUSTRALIAN BIRDS, c.1812
(I) RED-TAILED BLACK COCKATOO, CALYPTORHYNCHUS MAGNIFICUS watercolour on paper 17.0 x 11.0 cm signed lower right: Howitt (II) YELLOW-TAILED BLACK COCKATOO, CALYPTORHYNCHUS FUNEREUS watercolour on paper 17.0 x 11.0 cm signed centre right: Howitt