Letters relating to Mackay's teaching activities and to his books, including testimonials to 'The Theory and Practice of Finding the Longitude', n.d.
Letters relating to Mackay's teaching activities and to his books, including testimonials to 'The Theory and Practice of Finding the Longitude', n.d.
Related Material the <a href="http://cudl.lib.cam.ac.uk/view/MS-MKY-00009/1">Board of Longitude Digital Archive</a> for a digitised copy of these letters.
Related Material the <a href="http://cudl.lib.cam.ac.uk/view/MS-MKY-00009/1">Board of Longitude Digital Archive</a> for a digitised copy of these letters.
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