Note 50 — II Hymns of the Bible and the Early Church

‘Most old MSS. read munerari. The common reading, “in gloria numerari,” does not appear to be found in any MSS., but is in many (not all) printed editions of the Breviary from about 1491 onwards. Mr. Gibson suggests that it is not so much due to the natural confusion of letters as to the well-known words added by Gregory the Great to the canon of the Mass in electorum tuorum jubeas grege numerari.’—Dictionary of Hymnology, p. 1121.