1. NHD4/631 Reference (shelfmark): NHD4/631 Title: Green Imperial Pigeon Scope & Content: Green Imperial Pigeon ‘Ducula aenea’ Original inscriptions:’ Columba aenea. Raffles’ Further inscriptions: Artist: Medium: Watercolour Size: 275 by 416 mm Note: Collection Area: Visual Arts Languages: Not applicable Date Range: 1820 Extent: 1 Item