The fourth type of royal revenue was the quinto, a tax on treasure. There were two kinds: the true fifth was ordinarily associated with mines or pearl fisheries, but could be applied to other sources of regular extraction: the other quinto, actually a half, was also called the “tax on hallazgos” (finds). It was the royal share of salvage and of booty, which could be either the spoils of legitimate war or of the systematic looting of graves. When both quintos were applied to the same treasure, with the fifth taken out first and the tax on hallazgos from what remained, the king’s share was 60%. (Bushnell KC)