1) <b><i>Nine Generations of Fur Trading</i>. P. R. Poland &amp; Son Limited. Fur Merchants and Agents, London.</b> Letter of John Jacob Astor, New York 1827.
<dl><dd>2)<i> P. R. Poland &amp; Son - Eight Generations of Fur Trading, 1928.</i></dd></dl>
John Jacob Astor
Collection G. &amp; C. Franke