Royal institutions: being proposals for articles to establish and confirm laws, liberties, & customs of silver & gold mines, to all the king's subjects, in such parts of Africa, and America, which are now (or shall be) annexed to, and dependant on the crown of England. With rules, laws, and methods of mining, and getting of precious stones; the working and making of salt-petre; and also, the digging and getting of lead, tin, copper, and quicksilver-oars ... / by Thomas Houghton ..