magical papyrus in the British Museum, in which nineteen columns are written on the recto, and the remaining thirteen on the verso.1 In any case we have abundant evidence of the use of the verso, when fresh papyrus was not available, as when a man writes a letter on the back of a business document, explaining that he had been unable at the moment to find a “clean sheet” (χαρτίον καθαρόν),2 or as when the back of the official notification of the death of a certain Panechotes is used for a school-exercise
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