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There are two possibilities. As Olin Lathrop states it's a grindstone, and would be used to sharpen, or "file" things. It that's the case, then you would not use it to start a fire. It's part of...
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There are two possibilities. As Olin Lathrop states it's a grindstone, and would be used to sharpen, or "file" things. It that's the case, then you would not use it to start a fire. It's part of...