Photographs illustrating emotions of grief from Charles Darwin's work "The Expressions of the Emotions in Man and Animals," published by J. Murray, London, 1872. Image courtesy of the Beinecke Rare Book &amp; Manuscript Library, Yale University.<a rel="nofollow" class="external autonumber" href="http://beinecke.library.yale.edu/dl_crosscollex/brbldl/oneITEM.asp?pid=2008508&amp;iid=1044603&amp;srchtype=">[1]</a>
Charles Darwin (author of volume); unknown photographer of plate
Beinecke Rare Book &amp; Manuscript Library, Yale University <a rel="nofollow" class="external autonumber" href="http://beinecke.library.yale.edu/dl_crosscollex/brbldl_getrec.asp?fld=img&amp;id=1044603">[2]</a>