1. [Letter : W[illia]m Petty, 1653 March 1 to Samuel Hartlib] Creator: Petty, William, Sir, 1623-1687 Published / Created: 1653 March 1 Call Number: OSB MSS FILE 16807 Collection Title: Osborn Manuscript Files Container / Volume: Folder 16807 Image Count: 3 Resource Type: Archives or Manuscripts Found in: Beinecke Rare Book and Manuscript Library > [Letter : W[illia]m Petty, 1653 March 1 to Samuel Hartlib]