Nelson Platt Wheeler (Pennsylvania Congressman)
Harris &amp; Ewing
<a rel="nofollow" class="external text" href="https://www.loc.gov/item/hec2009003173/">Harris &amp; Ewing Collection</a>, Library of Congress.  Call Number LC-H25- 16479-D [P&amp;P].  Digital ID hec 16475 <a rel="nofollow" class="external free" href="http://hdl.loc.gov/loc.pnp/hec.16475">http://hdl.loc.gov/loc.pnp/hec.16475</a>.  Control Number hec2009003173.  Reproduction Number LC-DIG-hec-16475.