Thomas Erskine, 1st Baron Erskine by Thomas Lawrence (1802), Lincoln’s Inn, London. This image is in the public domain because under United States copyright law, originality of expression is necessary for copyright protection, and a mere photograph of an out-of-copyright two-dimensional work may not be protected under American copyright law. Courtesy of Wikipedia Commons: http://en.wikipedia.org/wiki/File:Thomas_Erskine_by_Thomas_Lawrence_1802.jpg