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This class consists of eighteen volumes of sailing directions, navigational notes and coastline sketches, seventeenth to twentieth centuries. The earliest volume is French, 'Journal en forme de Borthlan de la campagne des galeres au voyage d'Alger', 1682, but the majority of the items date from the late eighteenth and early nineteenth centuries. They include a description of Hadley's quadrant, c 1770; sailing directions for the Mediterranean, 1798, 1830; a nautical description of the south coast of England, 1805 to 1808, compiled by Graeme Spence (1758-1812) from Murdoch Mackenzie's surveys; and a sketchbook of Nelson's anchorages in the Mediterranean, 1804. There are also two twentieth-century volumes, one of which is the current angle and distance tables, 1911.