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A non-auriferous siliceous solution may have filled a fissure, and, after solidifying, some volcanic disturbance may have forced water impregnated with a gold salt through the interstices of the lode formation, when, if the conditions were favourable, the gold would be deposited in metallic forms.

And not less remarkable than their infatuation for non-auriferous reefs was their vivid interest in bushrangers and blackfellows; but whereas they received my crude geological information with the attention which its frankness certainly merited, it was plain that their idea of prospecting the back-blocks with the pick in one hand and the rifle in the other, remained unshaken by my repeated assurances of peace and safety.

In the Savana de la Miel, near the town of Barquesimeto, a shaft has been sunk in a black shining slate resembling ampelite. The minerals extracted from this shaft, which were sent to me at Caracas, were quartz, non-auriferous pyrites, and carbonated lead, crystallized in needles of a silky lustre.

Another reason that made it more easy for Erewhon to remain unknown, was the fact that the more mountainous districts, though repeatedly prospected for gold, had been pronounced non-auriferous, and as there was no sheep or cattle country, save a few river-bed flats above the upper gorges of any of the rivers, and no game to tempt the sportsman, there was nothing to induce people to penetrate into the fastnesses of the great snowy range.