Gun Island and phosphate mining thumb|In 1845, the British Admiralty published a chart of "The Houtman Rocks", based on the 1840 survey of John Clements Wickham and John Lort Stokes.
Gun Island and phosphate mining thumb|In 1845, the British Admiralty published a chart of "The Houtman Rocks" based on the 1840 survey of John Clements Wickham and John Lort Stokes.