Taking the Vote on the Impeachment of President Johnson, Senate Chamber, Washington, D.C., May 16th, 1868. – Senator Ross, of Kansas, Voting "Not Guilty." – Wood engraving, black and white, after James E. Taylor. – To the right on the dais: two Senate Pages.
Unknown author<span style="display: none;">Unknown author</span>
Frank Leslie's Illustrated Newspaper, June 6, 1886, <a rel="nofollow" class="external free" href="https://www.senate.gov/artandhistory/art/common/image/Ga_chamber_38_00378a.htm">https://www.senate.gov/artandhistory/art/common/image/Ga_chamber_38_00378a.htm</a>