Complex sentence: Timber stables were built on the site using convict labour in the 1860's, a fire caused by spontaneous combustions of composite heap in 1890 destroyed the timber stables along near by farm land.
Split into simpler sentences: Timber stables were built on the site using convict labour in the 1860s. A fire caused by spontaneous combustion of a composite heap in 1890 destroyed the timber stables along near by farm land.