Walter William Skeat, Chaucer's Works (ed. Skeat) Vol… (1900)
“ For the sake of clearness, the earlier version is here called 'Text A,' and the later version 'Text B.''Text A' exists in one MS. only, but this MS. is of early date and much importance. It is the MS. marked Gg. 4. 27 in the Cambridge University Library, and is here denoted by the letter 'C.' It is the same MS. as that denoted by the abbreviation 'Cm.' in the footnotes to the Canterbury Tales and Troilus and Criseyde. This text is printed in the upper part of the following pages. The footnotes give the MS. spellings, where these are amended in the text. ”
