The Crucial Gap

century dance she had just been taught. She laid down her lorgnette on the pile of papers and said: "Yes; but this doesn't mean that." ("This" was the documentary evidence, "that" the reconstructed dance.) She then proceeded to spend the rest of her life and the whole of her fortune trying to find what "this" did really mean. Up to this point it had been taken for granted that the acquisition of the recorded evidence was sufficient in itself. Its translation into