After the building was gutted by an 1877 fire, Philip Herapath supervised the reconstruction. From 1869 to 1879, Thomas Aickin served as medical superintendent. In 1879, a new wing to the asylum was under construction and stone for it was mined from nearby Oakley Creek. An estimated two-thousand tons of stone was made available in this exercise through detonation of 16 barrels of gunpowder under a 20-foot deep bed of lava, which created a miniature "earthquake" felt in the surrounding area. In 1891, T. R. King, Medical Superintendent, resigned because of ill-health, and was succeeded by Gray Hassell, who had been an administrator at the Wellington Hospital and Wellington Asylum.
