Darwin’s Children Drew All Over the On The Origin of Species Manuscript

http://theappendix.net/blog/2014/2/darwins-children-drew-vegetable-battles-on-the-origin-of-species

But there are other drawings in Darwin’s papers that defy explanation – until we remember that Darwin and his wife Emma (who, famously, was also his cousin) had a huge family of ten children. Scholars believe that a young Francis Darwin, the naturalist’s third oldest son, drew this on the back of Darwin’s manuscript for On the Origin of Species.