Complex sentence: Sadly, it was burnt out twice-once in 1879, just after its completion, and again, and finally, in August 1913 and never re-built; instead the nearby stable block of the older Kenmare House was converted for family use.
Split into simpler sentences: Sadly, it was burnt out twice-once in 1879, just after its completion, and again, and finally, in August 1913 and never re-built. Instead the nearby stable block of the older Kenmare House was converted for family use.