Codex Louaniensis, or L, the best MS. of Caesar in the British Museum (Add. MSS. 10,084), which is assigned to the eleventh century, has been collated by Alfred Holder for his edition of the Bellum ciuile and by Mr. R. L. A. Du Pontet for his edition of the Bellum Alexandrinum and the Bellum Africanum; but for the Bellum Gallicum no collation has hitherto been available. Last year I made one, which I sent to Dr. Meusel. He urged me to publish it, remarking that it would be very useful, as ‘wir haben nun ein sichereres Urteil über die Familie φ.’ Relying upon Holder's collation, he had described L in his own edition of the Bellum ciuile (1906, p. viii) as ‘a twin-brother of Ashburnhamianus’ (S); and so it is in the Bellum ciuile, but, as he acknowledged after reading my collation, not in the Bellum Gallicum. The first folio, comprising i, I–6, §3 (… bono animo in), is by a later hand. The MS. is described in the Catalogue thus: ‘c. Jvlii Caesaris commentariorum libri. Desinit cum verbis “res eis suppeteret” in libro de Bello Africano, cap. 33. Codex membranaceus, sec. XL, sed folium primum a manu recentiori suppletum est. Folio [10,084.].’