Complex sentence: Work began on the Geelong-Ballarat line in 1858 under the supervision of the Victorian Railways Engineer Robert Watson and at least partly designed by Francis Bell, and the line was officially opened 10 April 1862.
Split into simpler sentences: Work began on the Geelong-Ballarat railway in 1858 under the supervision of the Victorian Railways Engineer Robert Watson. The line was at least partly designed by Francis Bell and was officially opened 10 April 1862.