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Updated: May 31, 2025
When we took them into our hands, we were surprised at their weight, and found that they were made of a fine, black coal-slate. A man who stood by explained to us that this slate is a peculiar product of their islands. When first quarried, it is so soft as to be easily cut; and when afterward rubbed with oil, and exposed to the air, it becomes intensely hard.
This plant was afterwards found growing in the sandy beds, or along the bergs of almost all the broad rivers, and was always a welcome sight; for the seeds, after roasting and pounding them, afforded us a very agreeable substitute for coffee. We passed some very high cliffs, which showed a fine geological section of horizontal layers of sandstone and coal-slate.
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