On 21 February 1812 John Clements Wickham joined the Royal Navy. By 1815 he was an Admiralty Midshipman and was posted to HMS
Nightingale and in 1818 was posted to HMS
Hyperion before being paid off. He passed his Lieutenant's examination in 1819. From 1837 to 1841, the
Beagle charting the coasts of
north western Australia and
Arnhem Land. In 1839, Stokes sighted a natural harbour which Wickham named
Port Darwin after their former shipmate. Some notable events: • Reached
Swan River: 15 November 1837 • Discovered
Fitzroy River: 1838 • Left Sydney for
Port Essington: 22 May 1839 • Arrived at Port Essington: January 1840 • Discovered and named
Adam Bay: 1840 • L. R. (Lewis Roper) Fitzmaurice (mate) discovered
Adelaide River mouth at the
Clarence Strait: 1840 • Discovered
Port Darwin: 1840 • Discovered
Victoria River: 1840 • Discovered
Fitzmaurice River: 1840 • Wickham and Stokes found evidence of
Zeewijk, (a Dutch East Indiaman wrecked 1727) on
Gun Island off
Geraldton: April 1840 In 1841, Wickham fell ill and resigned his command which was taken over by Stokes, who continued the survey and completed the voyage in 1843. Darwin also took a
Galápagos tortoise named
Harriet which he gave to Wickham, who brought it to Brisbane. The tortoise gained fame for her
longevity, living 175 years until 2006. == Later life ==