A paleographical study at the British Museum in 1938 found that the text had undergone several corrections. The first corrections were done by several scribes before the manuscript left the scriptorium. Many alterations were made in the sixth or seventh century, which, according to a colophon at the end of the book of [[Esdras]] and [[Book of Esther|Esther]], states that the source of these alterations was ''"a very ancient manuscript that had been corrected by the hand of the holy [[martyr]] [[Pamphilius of Caesarea|Pamphylus]]"''. From this is concluded, that the manuscript had been in [[Caesarea Palaestina]] Palaestina in the sixth or seventh centuries.<ref>Bruce A. Metzger, the Text of the New Testament, it's Transmission, Corruption and Restoration, Oxford University Press, 1992, p46.</ref> Uncorrected is the pervasive iotacism, especially of the ει diphthong.