The Eucharistic liturgy of the Assyrian Church of the East that is attributed to the apostles Mar Adai and Mar Mari is the oldest Eucharistic liturgy in continual use today. It is also used by the Chaldean Catholic and the Syro-Malabar churches. This volume contains four items: (1) The Syriac edition published by the Anglican Mission in Urmia in 1890. This edition included the two other Eucharistic liturgies used in the Church of the East (of Theodore and of Nestorius, but renamed ÒSecondÓ and ÒThirdÓ respectively) as well as the service of Baptism. (2) The English translation of the same volume by J. Payne Smith published by the Mission in London in 1893. (3) The Syriac edition of the three Eucharistic liturgies published at the Dominican Press in Mosul in 1901 for the Chaldeans. (4) The Syriac edition of the service of Baptism published at the Dominican Press in Mosul in 1907 for the Chaldeans.