1. [Postcard : 1914 January 30, Arnold Ronnebeck and Karl von Freyburg to Marsden Hartley] Published / Created: 1914 January 30 Call Number: YCAL MSS 578 Collection Title: Marsden Hartley collection Container / Volume: Box 12 | Folder: Ronnebeck, Arnold Image Count: 2 Resource Type: Archives or Manuscripts Found in: Beinecke Rare Book and Manuscript Library > [Postcard : 1914 January 30, Arnold Ronnebeck and Karl von Freyburg to Marsden Hartley]
2. [Postcard : 1915 November 29, Arnold Ronnebeck to Marsden Hartley] Published / Created: 1915 November 29 Call Number: YCAL MSS 578 Collection Title: Marsden Hartley collection Container / Volume: Box 12 | Folder: Ronnebeck, Arnold Image Count: 2 Resource Type: Archives or Manuscripts Found in: Beinecke Rare Book and Manuscript Library > [Postcard : 1915 November 29, Arnold Ronnebeck to Marsden Hartley]