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But the work in the mines is not so pleasant, and the two thousand negroes employed in that work by the government are obliged even to divert the watercourses to get at the diamantiferous sand. Formerly it was easier work." "In short," said Fragoso, "the good time has gone!"
Many have suspected that these regions will prove diamantiferous; and it is reported that an experienced French mineralogist, who has visited the South African diggings, landed at Assini and proposed to canoe up the Tando River to the Tákwá mines, prospecting in search of his specialty.
Below this were strata of trachitic breccia and augite; the formation was then seamy to an unknown depth. Within the reef, the surface soil was red, and of a sandy nature. The next stratum was of a loose, yellow, gravelly lime, and the third blue, of a hard, slaty nature. This last was the real diamantiferous soil.
A screen, or cylinder wash mill and elevator, were used for dealing with the diamantiferous soil, and were described. Standing wires were fixed at the back of the machinery, and passed over a frame fixed at the top of the mine, the end of the mine being secured to strong wooden posts.
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