Navigational workbook.
Navigational workbook: collected observations and workings, 1825-1852.
Related Material the <a href="http://cudl.lib.cam.ac.uk/view/MS-FIS-00023/1">Board of Longitude Digital Archive</a> for a digitised copy of the navigational workbook.
Related Material the <a href="http://cudl.lib.cam.ac.uk/view/MS-FIS-00023/1">Board of Longitude Digital Archive</a> for a digitised copy of the navigational workbook.
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