This is the first publication of a group of thirty documents on leather in Imperial Aramaic, dating to the fourth century B.C.E. and reflecting the practice of the Achaemenian administration in Bactria and Sogdiana. Eighteen inscribed wooden sticks, for use as tallies, dated to the third year of King Darius Ill, are also included. They are considered to be the second most important discovery of its type known. Two of the leather documents relate to the fall of the Persian Empire: one mentions Bessus, the usurper of the Persian throne, travelling to Warnu (Greek Aornos); the other is a long list of supplies in the year 7 of King Alexander. In addition to their valuable historical contents, the docu­ ments enrich our knowledge of Aramaic and its lexicon. The documents are given in Aramaic with translation, introduction, commentary and glossary. The volume is lavishly illustrated.