Complex sentence: The building was a post mill where the whole structure could be turned into the prevailing wind.The building survived into the twentieth century and is shown as disused on the 1886 Ordinance Survey Map, though it had gone by the second edition of the map in 1914.
Split into simpler sentences: The building was a post mill where the whole structure could be turned into the prevailing wind. The mill survived into the twentieth century and is shown as disused on the 1886 Ordnance Survey Map, though it had gone by the second edition of the map in 1914.