The Antona has been supposed to be the Avon, and an emendation of the text to Aufona has been proposed. This has been pronounced to be a happy conjecture, but the author does not think so. Avon is derived from no word that could possibly assume the form of Aufona; and it is difficult to understand what a line of forts from the Avon to the Severn was to accomplish. The Nen, which has also been suggested, confines the province too much. It was more probably the Don, which falls into the Humber. The Don and the Severn were connected by the Fosseway and the forts along its line. That the province had reached the frontier of the Brigantes in the reign of Claudius, may be inferred from the lines of Lucius Annæus Seneca:— Ille Britannos Ultra noti Litora ponti Et cæruleos, Scuta Brigantas Dare Romuleis, Colla catenis Jussit, etc. Footnote 30: See chap. ii. note ^{63}. Footnote 31: Pomponius Mela (A.D. 45) mentions them—‘Triginta sunt Orcades, angustis inter se ductæ spatiis: septem Hæmodæ, contra Germaniam vectae’ (_De s. orb._ iii. 6). Eutropius has ‘quasdam insulas etiam ultra Britanniam in Oceano positas Romano imperio addidit (Claudius) quae appellantur Orcades’ (_Hist. Rom._ lib. iv. c. 13). It is difficult to reconcile this statement with that of Tacitus, that Agricola first made the Orcades known. That any conquest took place in either case is unlikely, and they were probably annexed to the Roman Empire in the sense in which an island in the Pacific, when first observed, is declared to belong to Britain, and named Victoria. The existence and position of the Orkneys may have become known under Claudius, and first actually seen under Agricola. Footnote 32: The anonymous geographer of Ravenna gives a list of the towns of Britain when the Romans left the island. Though plainly not stated in any regular order, they are still manifestly grouped according to situation, and those north and south of the walls can be clearly distinguished. Among those north of the wall, between the Solway and the Tyne, is the town called by him Venusio, and the identity of the name shows its connection with Venusius. Footnote 33: Tacit. _Annal._ lib. xii. c. 40. The expression ‘regnum ejus invadunt’ shows that Cartismandua’s kingdom was now distinguished from that in the interest of Venusius. ‘Acre prælium fecere cujus initio ambiguo finis lætior fuit.’ Footnote 34: