(1) Mr. G. L. Cheesman's Auxilia of the Roman Imperial Army (Oxford University Press) does not deal especially with Roman Britain, but it deserves brief notice here. It is an excellent and up-to-date sketch of an important section of the Roman army, with which British archaeologists are much concerned. It also contains valuable lists, which can be found nowhere else, of the 'auxiliary' regiments stationed in Britain (pp. 146-9 and 170-1). It is full, cheap, compact; every historical and archaeological library should get it.
(2) A learned and scholarly attempt to settle the obscure chronology of the north British frontiers in the fourth century has been made by Mr. H. Craster, Fellow of All Souls, and one of the excavators of Corbridge, in the Archaeological Journal (lxxi. 25-44). His conclusions are novel and, though to some extent disputable, are well worth printing. Starting from the known fact that, during much of the third century, the north frontier of Roman Britain coincided roughly with the line of Cheviot and was then withdrawn to the line of Hadrian's Wall, he distinguishes five stages in the subsequent history. (1) At or just before the outset of the fourth century, in the reign of Diocletian, the Wall was reorganized in some ill-recorded fashion. (2) Thirty years later, towards the end of Constantine's reign, about A.D. 320-30, it was (he thinks) further reorganized; perhaps its mile-castles were then discarded. (3) Thirty or forty years later still, after disturbances which (he conjectures) included the temporary loss of Hadrian's Wall and the destruction of its garrisons, Theodosius carried out in 369 a fuller reorganization. This garrison had consisted of the regiments known to us by various evidence as posted 'per lineam valli' in the third and early fourth centuries; their places were now filled by soldiers of whom we know absolutely nothing. (4) In 383 Maximus withdrew these unknown troops for his continental wars. Now perhaps the line of the Wall had to be given up, but Tyne and Solway, South Shields, Corbridge, and Carlisle were still held. (5) Finally, about 395-9, Stilicho ordered a last reorganization; he withdrew the frontier from the Tyne to the Tees, from Carlisle to Lancaster, and garrisoned the new line with new soldiery?those, namely, which are listed in the Notitia as serving under the Dux Britanniarum, save only the regiments 'per lineam valli'; these last the compiler of the Notitia borrowed from the older order to disguise the loss of the Wall. Even this did not last. In 402 Stilicho had to summon troops to Italy for home defence?among them, Mr. Craster suggests, the Sixth Legion?and in 407 the remaining Roman soldiers, including the Second Legion, were taken to the continent by Constantine III.
Every one who handles this difficult period must indulge in conjecture; Mr. Craster has, perhaps, indulged rather much. It might be simpler to connect the abandonment of the mile-castles?his stage 2?with the recorded troubles which called Constans to Britain in 343, rather than invent an unrecorded action by Constantine I. I hesitate also to assume for the period 369-83 an otherwise unknown frontier garrison, which has left no trace of itself. I feel still greater doubt respecting the years 383-99. Here Mr. Craster argues from coin-finds. No coins have been found on the line of the Wall which were minted later than 383, and none at Corbridge, Carlisle, and South Shields which were minted later than 395; therefore, he infers, the Wall was abandoned soon after 383, and the other sites soon after 395. This is too rigid an argument. It may be a mere accident that the Wall has as yet yielded no coin which was minted between 383 and 395. At Wroxeter, for example, two small hoards were found some years ago which had clearly been lost at the moment when the town was sacked. By these hoards we should be able to date the catastrophe. Now the latest coin in one hoard was minted in or before 377, and the latest in the other in or before 383. But newer finds show that Wroxeter was not destroyed at earliest till after 390. Again, as Mr. Craster himself says, the coining of Roman copper practically stopped in 395; after that year the older copper issues appear to have remained in use for many a long day. That is clear in Gaul, where coins later than 395 seem to be rare, although Roman armies and influences were present for another fifty years. When Mr. Craster states that 'archaeology gives no support to the theory that the Tyne-Solway line was held after 395', he might add that it gives equally little support to the theory that it was not held after 395.
