Romano-British archaeologists are now generally agreed in supposing that the final abandonment of Hadrian's Wall occurred about the time of the usurpation of Maximus in 383. This theory was first put forward by Dr. H. H. E. Craster in 1914, and it is supported by the results of the Birdoswald Excavations of 1929. It rests mainly on negative evidence, but it is evidence which was formidable in 1914 and is still more formidable to-day, since no coin later than 383 has ever been reported from the Wall—except the one which is the subject of this paper. Moreover it becomes evident that the reason for the cessation is historical and not numismatic, when it is realised that at other sites, some quite close to the Wall, the coin-series extends beyond 383. Romano-British archaeologists, therefore, impressed by the weight of the evidence, have assumed that the one exception to Dr. Craster's rule, the coin of Arcadius from Heddon-on-the-Wall, is a stray, the presence of which does not imply a garrison on the Wall at the time of its issue. Dr. Schultz, however, writing in this Journal, seems to imply that it is not a stray, but a testimony to the maintenance of a garrison on the Wall down to the fifth century.