Note 1 — Expenses Incurred for the Expedition to the Western Islands 1569–72

The peso was a money of account, commonly supposed to be worth fifteen reals vellón. There was also a silver coin called a peso, which was valued at eight reals of silver, and weighed one onza (a trifle more than the English ounce). The real (=34 maravedis) is equivalent to nearly five cents of United States money; it is no longer coined, but is still a unit of value throughout Spain. The tomin for gold was equivalent to 8.883 grains (United States weight), and for silver to 9.254 grains. From a document published in Doc. inéd. Ultramar, vol. ii, pp. 461–463, it appears that seven tomines of gold were equivalent to one peso of gold.