Captain Collet Barker April 1831
Governor Darling stationed at King George's Sound (Albany) in Western Australia, commissioned Barker to proceed to southern Australia in the Isabella to follow up on Sturt's 1829-30 exploration of the Murray. Barker and his first officer John Kent, crossed the Mt. Lofty Ranges and proceeded along the shores of Lake Alexandrina to the Murray Mouth. (See map inset)
Barker swam across the river with the compass strapped to his head to make an observation from a sandhill. He never returned. It was later discovered that he had been speared by the natives and his body carried out to sea. His name is perpetuated in the town of Mt. Barker and by Barker's Inlet at Port Adelaide.
In 1831, Captain John Hart in the schooner Elizabeth of Launceston, visited Kangaroo Island.
In November 1833 he actually landed on the plains of the future city of Adelaide. He was interviewed about his knowledge of the coast and soil by the founders of South Australia in England in 1835 later giving sailing directions to Colonel Light about to leave in the Rapid.
Captain Jones Re-discovers Barker's Inlet - January 1834
The next major discovery was by Captain John Jones in the schooner Henry of 55 tons. After sealing on Kangaroo Island late in 1833, he crossed over to Cape Jervis and proceeded west along the coast to discover a fine harbour sheltered by an island entrance which was called Jones's Harbour - now known as Port Adelaide.
The evidence of all of the above mariners and explorers was taken into consideration by the founders of South Australia in forming their instructions to the Colonial Officers.