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Rh to have been made by the imperfect meeting of two moulding stamps. If the inscription had been cut on the clay, this defect would not appear; the vertical lines would have been connected, and the ragged white line would have been made smooth.

This method of printing in clay was rude and imperfect, but, to some extent, it did the work of modern typography. Writings were published at small expense, and records were preserved for ages without the aid of ink or paper. The modern printer may wonder that this skill in printing was not developed. The engraving that was used to impress clay could have been coated with ink and stamped on parchment. Simple as this application of the engraving may appear, it was never made. So far from receiving any improvement, the art of printing in clay gradually fell into disuse. It has been neglected for more than twenty-five centuries on the soil where it probably originated. For Layard tells us that an Assyrian six-sided cylinder was used as a candlestick by a reputable Turcoman family living in the village where it was found. A hole in the centre of one of the ends received the tallow candle. There is a practical irony in this base application of what may have been a praise of "the great king" which has never been surpassed by Solomon or Shakspeare in their reflections on the vanity of human greatness.

Engraving was used by the ancient Greeks in a manner which should have suggested the feasibility of printing with ink. Some of the maps of the Athenians were engraved on smooth metal plates, with lines cut below the surface, after the method of copper-plate printers, from which impressions on vellum, or even on papyrus, could have been taken. But, so far as we know, the impressions were not taken: for every new map there was a new engraving.

The Assyrian method of engraving stamps for impressing clay was practised by the old Roman potters, who marked their manufactures with the names of the owners or with the contents of the vessel. The potters clearly understood the