surveyed by Commander Morris H. Smyth, R.N. assisted by Lieuts. B.T. Somerville, F.C. Learmouth, F.H. Walter, Sub Lieuts. F.N. Grant, G.B.S. Simson & H.C. Watson, R.N., H.M. Surveying Ship "Egeria" 1897 and from the Chilean government charts 1918 ; published at the Admiralty, 15th Octr. 1898 ; Engraved by Davies & Company