1. The Invisible Encounter Letter Creator: Brasol, Boris, 1885- Published / Created: 1943 November 16 Call Number: GEN MSS 1046 Collection Title: Igor Ivan Sikorsky writings Container / Volume: Box 1 | Folder 7 Image Count: 5 Resource Type: Archives or Manuscripts Found in: Beinecke Rare Book and Manuscript Library > The Invisible Encounter Letter