Early Church Fathers
1 Gerbert makes it quite evident that from about 850 until 1200, that is from Amalarius until Durand, the same view was held in the West. Vide Gerbertus. Vetus Liturgia Allomanica, p.855 et .seqq.
2 The English reader is referred to G. V. Shann, Euchology", and The Book of Needs, for excellent translations of the Greek offices; J. M. Neale's Introdnction to the History of the Holy Orthodox Eastern Church will of course, be consulted.