Sent by August Friedrich Leopold Weismann, Freiburg i.Br., Germany to Alfred Russel Wallace, [9 St Mark's Crescent, Regent's Park, London, N.W.] on 13 December 1868.
Re. polymorphism in butterflies
A typical letter handwritten by author in German and signed by author.
An original MS
Total Pages : 4
Pages with text: 4