Photograph showing Wittgenstein’s house in Norway, sent by Wittgenstein to Moore, October 1936.
Unknown author<span style="display: none;">Unknown author</span>
circa October 1936 <div style="display: none;">date QS:P,+1936-10-00T00:00:00Z/10,P1480,Q5727902</div>
Ludwig Wittgenstein: The Duty of Genius by Ray Monk (<a href="//commons.wikimedia.org/wiki/Special:BookSources/978-1-448-11267-8" title="Special:BookSources/978-1-448-11267-8">ISBN 978-1-448-11267-8</a>)