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7Some are found in certain places in a native state, and thence dug up, whilst others are composed of different substances, ground and mixed together, so as to answer the same purpose. First we shall explain the nature of that which is found native, called by the Greeks ὦχρα. This, as in Italy, is discovered in many places, but the best is the Attic sort, which cannot now be procured, for in working the silver mines at Athens, if by chance they fell upon a vein of ochre, they followed it up just as they would one of silver. Hence the ancients used abundance of ochre in their finishings.
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