Manual of navigation : manuscript, [1697?].MS Typ 805 Houghton Library, Harvard University
![Manual of navigation : manuscript, [1697?].MS Typ 805 Houghton Library, Harvard University](https://64.media.tumblr.com/19db4e8ddb466be3dcc36efb1ead35c7/tumblr_n163zuFD6N1s83h8do1_1280.jpg "Manual of navigation : manuscript, [1697?].MS Typ 805 Houghton Library, Harvard University")
Manual of navigation : manuscript, [1697?].MS Typ 805 Houghton Library, Harvard University -- source link
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