11. Cheap convict labour could overcome the significant shortage of manpower in the colony. 12. The expenditure in the jail is recovered by the value of the convict labour . 13. Both projects utilised convict labour under the command of Nerriga landowner Colonel John Mackenzie. 14. The lighthouse was built by convict labour using locally quarried dolerite over two years. 15. It was built in 1827 by convict labour . 16. The northern side of the point was excavated by convict labour to form Belmore Basin. 17. Some assigned convict labour was also used in this area during the 1830s and 1840s. 18. With the help of convict labour , the district received more settlement and better roads. 19. The gaol was built using sub-contract labour with stone provided by convict labour . 20. The Albany Convict Gaol is unique in the history of convict labour in Western Australia.
