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Correspondence-Professor T. McKenny Hughes. 187 have yet proved a Neozoic cover so thick as to preclude the possibility of successfully working any coal which may he found beneath it. It is argued that the time has now come for the organization of a systematic survey of this area by means of a considered series of borings so planned as to investigate the structure of the concealed Palaeozoic floor, to ascertain the thickness of cover, to locate any coalbasins which may form part of the floor,doi:10.1017/s0016756800114268 fatcat:ksa6dhqfwbgopoakiqmdb5eebm