A pit pony working in a mine
Heinrich Börner (1864 – 1943)
Wikimedia Commons <a href="//commons.wikimedia.org/wiki/File:Nnc1.cu55831290_page_087.jpeg" title="File:Nnc1.cu55831290 page 087.jpeg">file:Nnc1.cu55831290 page 087.jpeg</a>