surveyed by Captn. H.W. Bayfield, R.N. 1831-37 ; re-examined by Commr. J. Orlebar, R.N. ; assisted by Commr. Hancock, Messrs. Des Brisay, Carey and Clifton, R.N., 1859 ; engraved under the direction of Capt. G.A. Bedford R.N., by J. & C. Walker
Relief shown by hachures and spot heights. Depths shown by isolines and soundings.
"Published ... 1st Novr. 1861 under the superintendence of Captn. Washington R.N., F.R.S. Hydrographer."
"2830b"--Lower right margin.