A struggle in stemmatics: "Barnwell" again

Doctoral work on the edition of the 13th century "Barnwell chronicle" is moving forward. I am about to attack Richard Kay's thesis that manuscript L (British Library Add. 35168) was the basis for all subsequent witnesses (ACMV). In his magisterial article published in Traditio (Walter of Coventry and the Barnwell Chronicle, vol. 54 , (1999), 141-167), h…