Described Hardwick & Luard: i.106–51; Schmidt, pp. 150–7; Seymour 1, pp. 108–10; Eisner pp. 59–60.

[1]

p. 212 [f. 1]

Litell lowys my sone i haue perceiued well by certeyne euidences thine abilite to lerne sciences touchinge noumbres and proporciouns and as wel considere i thy bisi preyere in special to lerne the tretis of the astrelabie than for as mechel as a philosofie seith he wrappeth him in his frend þat condescendith to the rihtful preiers of his frend …

p. 264 [f. 27]

… but litel while as thow wel knowest but natheles yif thow rekne hir vereye mouuyng by thy tables howre after howre.

‘Explicit tractatus de conclusionibus astrolabij compilatus per Galfridum Chauciers ad filium suum Lodewicum scolarem tunc temporis Oxonie ac sub tutela illius nobilissimi philosophi magistri N Strode’. Geoffrey Chaucer, A Treatise on the Astrolabe. IPMEP 438. Transcription of this MS by Schmidt pp. 150–85; ed. (not from this MS) by Eisner. For a translation of the text in this MS and reproduction of all sixty-two diagrams see Gunther.

Other texts: Eisner lists 32 MSS, including an extract in Camb. Trinity Col R.14 52 ff. 231v–234 not noted by IMEP 11; see further Edgar Laird, ‘A Previously Unnoticed Manuscript of Chaucer's Treatise on the Astrolabe’, Chaucer Review 34 (2000), 410–15. To these add Royal College of Physicians 62 (fragment). For copies already indexed see IMEP 9 indexing BodL Ashmole 360 [4], 391 [8], and 393 [1]; IMEP 11 indexing Camb. Trinity Col R.15.18 [1], and IMEP 14 indexing Peniarth 359 [1], NLW 3049 [1] and (in the summary list of contents only) NLW 3567 [1]. See Dd.12.51 [1].

s. xv in.