Referenced in:

• ed: 427 - London, British Library, Harley 1117 163-91 [Office for St Cuthbert coll. as X]
• mss: 427 - London, British Library, Harley 1117 161
• ed: 913 - [Rome], Città del Vaticano, Biblioteca Apostolica Vaticana, Reg. lat. 204 161, 185-6 [Office fragment coll. as Y]