John Ainsworth Horrocks, (1818–1846), English-born explorer and settler in South Australia
Several explorers had passed through the area on their way to more remote places, including Edward John Eyre and John Horrocks.
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With public interest in the new medium not forthcoming, Gill sold his camera to Robert Hall prior to his departure with John Horrocks' expedition northwards to the Flinders Ranges later in 1846.