Complex sentence: On 1 September 1847 he became temporary government botanist and inaugural director of the botanic gardens, Sydney, until the newly-appointed director, Charles Moore, arrived in Australia and took up his duties in January 1848.
Split into simpler sentences: On 1 September 1847 he became temporary government botanist and inaugural Director of Sydney's botanic gardens. Bidwill was succeeded by the permenant Director Charles Moore, who arrived in Australia and took up his duties in January 1848.