In the case of ModB, Lewis Lockwood has suggested a number of plausible ways in which the various repertories it contains might have found their way to Ferrara.
72 Lewis Lockwood (Music in Renaissance Ferrara 1400-1505: the Creation of a Musical Centre in the Fifteenth Century, Oxford, 1984) notes in connection with ModB that 'although the musical material [of the source] is of good quality, the Latin texts of many motets are corrupt and at times senseless, showing that the scribe did not know Latin well enough to know where he was going wrong' (p.