"(Enmerkar's) speech was substantial, and its contents extensive. The messenger, whose mouth was heavy, was not able to repeat it. Because the messenger, whose mouth was tired, was not able to repeat it, the lord of Kulaba patted some clay and wrote the message as if on a tablet. Formerly, the writing of messages on clay was not established. Now, under that sun and on that day, it was indeed so. The lord of Kulaba inscribed the message like a tablet.[26]"
http://en.wikipedia.org/wiki/Enheduanna
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