By the King : a proclamation for the maintaining and increase of the mines of saltpeter, and the true making and working of saltpeter and gunpowder, and reforming of all abuses concerning the same.
Alternative Title
Proclamation for the maintaining and increase of the mines of saltpeter
Publication Info
Imprinted at London : By Bonham Norton and Iohn Bill, Printers to the Kings most Excellent Maiestie, M.DC.XXVII [1627]