The early 1840s were a time of economic depression in New South Wales brought on by a severe drought in 1839, so Blacket was very fortunate to immediately gain employment from Bishop Broughton as Inspector of the Schools in connection with the Church of England in the Colony. This position involved the design and supervision of the building of schools, churches and parsonages. As the colony rapidly expanded, many school buildings were designed to be multi-purpose, serving as churches on Sunday and sometimes as court houses. Blacket began work on 1 January 1843, and on 18 January delivered to the Bishop the plans for the church of All Saint's, Patrick Plains (now Singleton). He estimated that it could be built for £700. It was eventually completed in 1850 for £713.11s.6d. Other churches that he supervised, designed or extended were St John's Ashfield (1843), St Mary's Balmain (1843), St Paul's Carcoar (1845), the old St Stephen's, Newtown (1845) and Christ Church St Laurence, Sydney.
