The Act goes on to define "mines and minerals" as "any strate or seam of minerals or substances in or under any land, and powers of working and getting the same". It goes on further to define a "hereditament" as "any real property which on an intestacy occurring before the commencement of this Act might have devolved upon an heir". The legal maxim is cuius est solum eius est usque ad coelum et ad inferos, which is Latin for "he who owns the land owns everything up to the heavens and down to the depths."