Complex sentence: A penal settlement was founded in 1824 at Redcliffe, north of the central business district, but was soon abandoned and moved to North Quay in 1825, opening to free settlement in 1842.
Split into simpler sentences: A penal settlement was founded in 1824 at Redcliffe, north of the central business district. That settlement was soon abandoned and moved to North Quay in 1825, and opened to free settlement in 1842.