Mid-19th Century Antique Hand-Coloured Engraving in Original Shadow Box Frame

Antique circa 1850. Hand-coloured engraving of two of the native magnificent Brazilian hummingbirds, trochilus magnificus. Excellent condition, devoid of flaws, nor foxing. Beautifully coloured by hand in the mid-19th century. Framed in a shadow box frame consistent of the period. After John Gould, from the Omithological Illustrations. Provenance: Acquired, Imported, and purchased as a set (despite age difference/discrepancy) with previous listing in Glasgow, Ireland, U.K.