[A primitive rock breaker.] The breaking of the auriferous rock is effected with two stones; of which one serves as anvil, and the other as hammer.  The former, which is slightly hollowed in the center, is laid flat upon the ground; and the latter, four by eight by eight inches in dimensions, and therefore of about twenty-five pounds weight, is made fast with rattan to the top of a slender young tree, which lies in a sloping position in a fork, and at its opposite end is firmly fixed in the ground.  The workman with a jerk forces the stone that serves for hammer down upon the auriferous rock, and allows it to be again carried upwards by the elasticity of the young tree.

[An arrastre.] The crushing of the broken rock is effected with an apparatus equally crude.  A thick stake rises from the center of a circular support of rough-hewn stones (which is enclosed in a circle of exactly similar stones) having an iron pin at its top, to which a tree, bent horizontally in the middle, and downwards at the two ends, is fixed.  Being set in motion by two carabaos attached in front, it drags several heavy stones, which are bound firmly to it with rattans, round the circle, and in this manner crushes the broken rock, which has been previously mixed with water, to a fine mud.  The same apparatus is employed by the Mexican gold-washers, under the name of Rastra. [Gold-washing.] The washing-out of the mud is done by women.  They kneel before a small wooden gutter filled with water up to the brim, and provided with boards, sloping downwards, in front of the space assigned to each woman; the gutter being cut out at these places in a corresponding manner, so that a very slender stream of water flows evenly across its whole breadth downwards over the board.  With her hand the work-woman distributes the auriferous mud over the board, which, at the lower edge, is provided with a cross-piece; and, when the light sand is washed away, there remains a stratum consisting chiefly of iron, flint, and ore, which is taken up from time to time with a flat piece of board, and laid on one side; and at the end of the day’s work, it is washed out in a flat wooden dish (batea), and, for the last time, in a coco-shell; when, if they are lucky, a fine yellow dust shows itself on the edge. [129] During the last washing the slimy juice of the Gogo is added to the water, the fine heavy sand remaining suspended therein for a longer time than in pure water, and thus being more easily separated from the gold-dust. [130]

[The clean-up.] It is further to be mentioned that the refuse from the pits is washed at the upper end of the water-gutter, so that the sand adhering to the stones intended for pounding may deposit its gold in the gutter or on the washing-board.  In order to melt the gold thus obtained into a lump, in which form it is bought by the dealers, it is poured into a small heart-shell (cardium), and, after being covered with a handful of charcoal, placed in a potsherd; when a woman blows through a narrow bamboo-cane on the kindled coals, and in one minute the work is completed. [131]