![Darwin, C. R. 1868. The variation of animals and plants under domestication. London: John Murray. First edition, first issue. Volume 1. Darwin, C. R. 1868. The variation of animals and plants under domestication. London: John Murray. First edition, first issue. Volume 1.](http://darwin-online.org.uk/converted/scans/1868_Variation_F877.1(online)/1868_Variation_F877.1_155.jpg)
Darwin, C. R. 1868. The variation of animals and plants under domestication. London: John Murray. First edition, first issue. Volume 1.
![Pigeon Boulant de Bavière bleu barré - Bavarian Cropper - Bayrischer Kröpfer ( Bayerkröpfer ) - YouTube Pigeon Boulant de Bavière bleu barré - Bavarian Cropper - Bayrischer Kröpfer ( Bayerkröpfer ) - YouTube](https://i.ytimg.com/vi/KLb2XBQ69s4/maxresdefault.jpg)
Pigeon Boulant de Bavière bleu barré - Bavarian Cropper - Bayrischer Kröpfer ( Bayerkröpfer ) - YouTube
![Darwin, C. R. 1868. The variation of animals and plants under domestication. London: John Murray. 1st edition, second issue. Volume 1. Darwin, C. R. 1868. The variation of animals and plants under domestication. London: John Murray. 1st edition, second issue. Volume 1.](http://darwin-online.org.uk/converted/scans/1868_Variation_F878.1(online)/1868_Variation_F878.1_152.jpg)
Darwin, C. R. 1868. The variation of animals and plants under domestication. London: John Murray. 1st edition, second issue. Volume 1.
![Darwin, C. R. 1868. The variation of animals and plants under domestication. London: John Murray. First edition, first issue. Volume 1. Darwin, C. R. 1868. The variation of animals and plants under domestication. London: John Murray. First edition, first issue. Volume 1.](http://darwin-online.org.uk/converted/scans/1868_Variation_F877.1(online)/1868_Variation_F877.1_150.jpg)
Darwin, C. R. 1868. The variation of animals and plants under domestication. London: John Murray. First edition, first issue. Volume 1.
![Darwin, C. R. [1868]. The variation of animals and plants under domestication. With a preface by Asa Gray. New York: Orange Judd and Co. Volume 1. Darwin, C. R. [1868]. The variation of animals and plants under domestication. With a preface by Asa Gray. New York: Orange Judd and Co. Volume 1.](http://darwin-online.org.uk/converted/published/1868_Variation_F879.1/1868_Variation_F879.1_fig179.jpg)