• Brittany

• Corbie?
• Canterbury
• Worcester

• Canon Law
• Penitentials

• Collectio Canonum Hibernensis, recension B (1r-130r)
• Excerpta de libris Romanorum et Francorum, also known as Canones Wallici (130r-132v)
• Canones Adomnani (132v-133v)
• Repetition of some chapters from the Hibernensis (133v-134r)
• Short text on weights and measures, followed by a short text on the names of the months apud Macedones (134r-v)
• Excerpts from Gaius, Institutiones (134v-138r)
• Tables, short legal tracts, excerpts from Isidore and the Iudicia Theodori (138r-142v)

• Certainly written by Breton scribes
• Probably written in Brittany
• Some contents certainly derive from a Breton exemplar / archetype

As pointed out by Flechner (2019: I, 133), this is one of the two complete surviving copies of recension B of the Collectio Canonum Hibernensis (the other being Rome, Biblioteca Vallicelliana, MS T. XVIII). Interestingly, the first quire (fols 1r-7v) is a replacement in English Caroline minuscule, written possibly at Canterbury; indeed, the MS had certainly reached England by the early eleventh century (cf. Flechner 2019, ibid.). The Breton name Matguoret occurs in a marginal entry at fol. 22r (perhaps the scribe's name?), and this MS also contains six glosses in Old Breton. It is probable that Hatton 42 was written in Brittany, although it is also conceivable that it was written by a Breton scribe working elsewhere, for example in a centre of the Loire Valley. In any case, the contents clearly belong to the Breton manuscript tradition of the Hibernensis and its associated texts: it is therefore virtually certain that at least the exemplar (or the ultimate archetype) of some of the texts in Hatton 42 came from Brittany. It should finally be pointed out that the fourth codicological unit too (fols 189r–204v), containing Ansegisus's Capitularies, may have been written in Brittany during the second half of the ninth century (according to the information provided on the MMOL page for this MS).

ASM 479–80 (§629); Bauer 2008: 179; Bieler 1963: 13, 20–4; Bishop 1971: xxvi; Bradshaw 1889: 412 ('a Hibernensis at Oxford'), 414, 471–3, 476, 480, 487; CLH 764 (§592), 790 (§621); Deuffic 2008: 136 (n. 268, '2e moitié du IXe s.'); DGVB 5; Dumville 1994: 91, 93, 95; Elliot 2013: 107–8; Flechner 2003–4: 131–3; Flechner 2004; Flechner 2008: 29–30, 41–2; Flechner 2019: I, 133–5; Lambert 2018: 6–9; Lapidge 1992: 100, n. 24; Lemoine 1985: 42–9, 289; MMOL; Mordek 1995: 404–6; PMSB 307–8 (§69); Schrijver 2011: 10; Smith 1992: 168 (n. 83); Stokes 1879–80: 328, 341–2.