Collection of letters from <a href="https://en.wikipedia.org/wiki/Roald_Amundsen" class="extiw" title="w:Roald Amundsen">Roald Amundsen</a> during the first World War.
<a href="//commons.wikimedia.org/w/index.php?title=Creator:Roald_Amundsen&amp;action=edit&amp;redlink=1" class="new" title="Creator:Roald Amundsen (page does not exist)">Creator:Roald Amundsen</a>
The National Archive of Norway, via <a rel="nofollow" class="external text" href="https://transcribathon.com/en/documents/id-21411/">Europeana 1914–1918</a>