{"value"=>"<p>The <em>Writings, 1927-1980</em> subseries includes Porter's Master's thesis, his published articles about Oregon business history and the fur trade, and transcriptions of letters Porter used in his book, <span class=\"title\">The Jackson and the Lees, Two Generations of Massachusetts Merchants, 1765-1844</span>, 2 vols. (Cambridge: Harvard University Press, 1937). There are also correspondence and drafts for the book he co-authored with H.M. Larson, <span class=\"title\">History of Humble Oil and Refining Company: A Study in Industrial Growth</span>, (New York: Harper, 1959). Manuscripts for articles about several historical figures are also included in this subseries.</p>"}