Complex sentence: The buildings are of local brick with galvanised iron roof and consisted of 12 male and 2 female cells which measured 9ft9 "and 10ft2" intended to accommodate 4 persons per cell.
Split into simpler sentences: The buildings are of local brick with galvanised iron roof. It consisted of 12 male and 2 female cells which measured 9ft9 "and 10ft2" and were intended to accommodate 4 persons per cell.