Original captions: 
<p>Upper: "Camp Douglas, Near Chicago, Illinois, where seven thousand rebel prisoners are quartered"
</p>
Lower: "Rebel prisoners at Camp Douglas, Chicago Illinois"
<bdi><a href="https://en.wikipedia.org/wiki/en:True_Williams" class="extiw" title="w:en:True Williams"><span title="American illustrator (1839-1897)">True Williams</span></a>
</bdi>
<i>Harper's Weekly</i>, April 5, 1862, <a rel="nofollow" class="external text" href="https://archive.org/stream/harpersweeklyv6bonn#page/214/mode/2up">page 215</a>