These papyri provide the first secure information, in concrete detail, on the purposes and the effects of the imperial tax reform under Diocletian at the end of the 3rd century and the beginning of the 4th. They also throw much new light on the 4th-century practice of "public liturgy"—the administrative device of making up the lack of money in the state treasury by compulsory labor service. An introduction, apparatus criticus, and translation accompany each text. A comprehensive index completes the volume.