[M] A 14½IN. RADIUS VERNIER SEXTANT BY JESSE RAMSDEN, LONDON, CIRCA 1770

A 14½IN. RADIUS VERNIER SEXTANT BY JESSE RAMSDEN, LONDON, CIRCA 1770

constructed in brass, signed on the lower cross bar Ramsden London, scale divided to 130º direct to arc, braced index arm, index mirror with Maskelyne flap, sighting tube, six shades, secondary mirror on rear-mounted adjustment lever, wooden handle and brass feet -- 17 x 17in. (43 x 43cm.) overall

This is the same pattern of sextant used by Captain Cook (1728-1779) on his first and second voyages of discovery. George Vancouver (1757-1798) had a 12½in. radius version when he joined the second voyage and disputed its accuracy with Ramsden who vigorously defended himself at the Board of Longitude.

Condition Report

Sighting tube lacks lenses; some dents to edges, traces of original finish behind.

We are pleased to provide you with a general report of the condition of this property. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Charles Miller Ltd is merely a subjective, qualified opinion. Prospective buyers should also refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue. NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD “AS IS” IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS PRINTED IN THE SALE CATALOGUE.