GSGS (Series) ; 3908. Popular ed. Transverse Mercator projection. "Surveyed in 1854-76. 3rd Revision 1923-4. Drawn, Heliozincographed, and Printed at the Ordnance Survey Office, Southampton. Published by Colonel Commandant E.M. Jack, C.B., C.M.G., D.S.O., Director General, 1925. Minor corrections 1929"