The original drum structure was made up of short semi circular lengths of hardwood that were marked with handy roman numerals, to help workman build it on site. This tells us that the dome was probably prefabricated at the Sydney Lumber Yard, corner of Bridge and George Streets, before re-assembly at the Barracks in 1817-19. The present reconstruction has involved prefabrication by John Wallis of Noel T. Leach Builders. The components of the south dome will be assembled on site for the Domes Breakfast talks on Wednesday 29 June 2011. Photo Gary Crockett