Note 9 — Expedition to the Mines of the Igorrotes

Quicksilver. 10. Wednesday, the twenty-fourth of the said month of April, four libras of quicksilver were incorporated with four quintals of ore, obtained from a passage or opening carefully concealed in [289] the bed of the streamlet, almost at the end of the said vein, and at the end of the other openings in it on the northwest side, where it obtains but very little sun and considerable dampness. It is an ore that contains a quantity of antimony, and one can obtain much of it, to judge from the works that the Ygolotes had, and those that we were making, as it seemed an ore of fairly good appearance. Compounding the assay of the said four quintals with salt and magistral,9 the compound was washed on the second of May following, and a grain of gold of one-half real weight obtained. Two onzas of quicksilver were lost.