Note 11 — Expedition to the Mines of the Igorrotes

Smelting. 25. Sunday, May twenty-six, a second assay by smelting was made with three quintals of litharge and one of tesmiquitate,11 refined; both were fluxed with three quintals of ore obtained from the second hole or passage above mentioned as being near the level of the streamlet in the said vein and new mine. That was a second and different compound and was made by smelting and with the said flux; but they were unable to fuse the ore, although many efforts were exerted. It was useless because of the poor quality that the miners ascribed to the said ore. Finding that there was considerable loss and waste of the lead, they had to desist.