Clay Letter Written in Cuneiform and Its Envelope, ca. 1850 B.C.E. In this letter from a city in Anatolia, located on the northern edge of the Fertile Crescent in what is now Turkey, a Mesopotamian merchant complains to his brother at home, hundreds of miles away, that life is hard and comments on the trade in silver, gold, tin, and textiles. Correspondents often enclosed letters in clay envelopes and sealed them by rolling a cylinder seal across the clay, leaving the impression of a scene, just as you might use a stamped wax seal today. Here the very faint impression of the sender’s seal at the bottom shows a person, probably the owner of the seal, being led in a procession toward a king or god.