 A letter from Pope Zachary to St. Boniface (1 May, 748, reports that an English synod had forbidden any baptism except in the name of the Trinity and declared that whoever omits the Name of any Person of the Trinity does not truly baptise.Henry Spelman and Wilkins put this synod at London in 603, the time of St. Augustine while Mansi makes its date the first year of Theodore of Tarsus, 668.The possibility of priests, presumably Irish, having been invalidly baptized was considered in the "Poenitentiale Theodori" (Lib.