A monograph of the Bucerotid, or family of the hornbills..[London]Published for the subscribers by the author [printed by Taylor and Francis]1882..biodiversitylibrary.org/page/38534629
The birds of Norfolk & Lord Howe Islands and the Australasian South Polar quadrant :London :H.F. & G. Witherby,1928.biodiversitylibrary.org/page/58795228
Illustration of a female Passenger Pigeon. I scanned it from the following publication--now in the public domain:Source Orthogenetic Evolution in the PigeonsDate of publication: 1920Author: Hayashi and Toda (artists), Charles Otis Whitman (author).Information also on file at Wikimedia Commons.This image is in the public domain, but Flickr does not have a setting for that license--so I have given it the least restrictive Creative Commons License.FCN2P29CA