Complex sentence: In the early 19th century the British became concerned about the possibility of a French colony being established on the coast of Western Australia and thus, in 1826, the New South Wales governor Ralph Darling established a settlement at King George Sound.
Split into simpler sentences: In the early 19th century the British became concerned about the possibility of a French colony being established on the west coast of Australia. In 1826 the New South Wales governor Ralph Darling established a settlement at King George Sound.