4to (315 x 195 mm). 87 ll. Manuscript in English, written in black ink. With several diagrams throughout, including one color drawing of a sailing ship. Original roan-backed marbled boards (losses to spine, worn, hinges broken, a few gatherings becoming loose). 

With a manuscript map of the Atlantic Ocean. Includes sections on plane trigonometry, plane sailing, traverse sailing, parallel sailing, middle latitude sailing, Mercator's sailing, the manner of surveying, coasts and harbors, the calculation of latitude and time using the moon and stars, lunar observations, methods for keeping a ship's journal at sea, and great circle sailing.