From Surveys by Commander G.E. Richards, R.N., and the Officers of H.M. Surveying Ship "Rambler" in 1897: Commander H.E. Purey-Cust, R.N., and the Officers of H.M. Surveying Ship "Rambler: in 1898: Staff Commander W. Tooker, R.N., and two Assistatns in the S.S. "Gulnare," 1898 with additions from earlier surveys by Comr. John Orlebar, R.N., Staff Comr. W.F. Maxwell, R.N., and Captain G. Cloué, of the French Imperial Navy.
