GOULD, John (1804-1881) 'Australian Spine-Tailed Swallow, Acanthylis Caudacuta,' & 'Australian Swift, Cypselus Australis' Descriptive sheet verso (2) (J. Gould & H.C. Richter) Hand Coloured Lithograph (2) 47x30cm & 52x35.5cm Estimate $150-250