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41a:40 ·
These two structures are prehistoric signs found engraved on rock walls in Valais, Switzerland. What they meant is not known and they have not yet been used in modern ideography. The general rule otherwise is that all signs that were in use 3,000 4,000 years ago are now used in one way or another in modern ideography, but with new meanings.
Compare these signs with the modern ideogram  for suitable reading distance.
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