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Letters inside marble? - Bad Archaeology
In November 1829, workers at the Henderson Quarry near Norristown, 17 km (12 miles) north-west of Philadelphia (Pennsylvania, USA), cut a block from a layer of marble found at a depth of 18-21 m (60-70 feet) and estimated to be around eight million years old. While sawing through the block, workmen at the Savage Sawmill …