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| | AIP International Catalog of Sources |
 | | Maury's correspondence with George Manning reflects his interest in Atlantic soundings, and Atlantic telegraph cable, trade on the Amazon and other South American rivers, and an expedition to the Arctic by Henry Grinnell. |
 | | Finding aid available in Library; also Box list, 1978. |
 | | Correspondents of the Nautical Almanac Office include W. Elkin, William Ferrel, Asaph Hall, Joseph Henry, Edward S. Holden, Albert A. Michelson, Maria Mitchell, C. Peters, Edward C. Pickering, T. Safford, Ormond Stone, David Todd, Alexander Twining, and C. Young. |
| www.aip.org /history/catalog/763.html (237 words) |
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