Referenced in:

• mss: 281.3 - London, British Library, Add. 19835 I.9
• mss: 281.5 - London, British Library, Add. 21213, fols. 2-25 I.340-1
• mss: 282 - London, British Library, Add. 23211 I.848
• mss: 283 - London, British Library, Add. 23944 I.921-2
• mss: 284 - London, British Library, Add. 24193 II.19
• mss: 285 - London, British Library, Add. 24199, fols. 2-38 II.21