1. ALS to Samuel Hartlib (d. 1670?); n.p. Published / Created: 1652 May 17 Call Number: OSB MSS FILE 16798 Collection Title: Osborn Manuscript Files Container / Volume: Folder 16798 Image Count: 3 Resource Type: Archives or Manuscripts Found in: Beinecke Rare Book and Manuscript Library > ALS to Samuel Hartlib (d. 1670?); n.p.