1. [Letter : W[illia]m Petty, 1650 August 31 to John Dury] Creator: Petty, William, Sir, 1623-1687 Published / Created: 1650 August 31 Call Number: OSB MSS FILE 16809 Collection Title: Osborn Manuscript Files Container / Volume: Folder 16809 Image Count: 2 Resource Type: Archives or Manuscripts Found in: Beinecke Rare Book and Manuscript Library > [Letter : W[illia]m Petty, 1650 August 31 to John Dury]