Tyne near North Berwick has a kind of estuary, and Mommsen’s conjecture that this is the Tanaus of Tacitus would have much probability, were it not so near to the far mightier estuary of the Forth that it is difficult to imagine any one choosing it as a landmark. The better known Tyne of Newcastle would be clearly the strongest claimant if the course of the narrative did not seem to have already carried us to the north of it. No piece of water would meet the geographical condition better than the splendid estuary of the Tweed, so well fitted by nature for a limitary stream, but no other passage of any author has been found in which any name resembling Tanaus has been applied to that river. In the next year (A.D. 81) Agricola undoubtedly reached and fortified the narrow neck of land between Clyde and Forth (Clota and Bodotria); but the point practically at issue is this: “May we understand that we have in this passage of Tacitus a description of the building by Agricola of some at least of the forts between Tyne and Solway on the line which was afterwards marked by the Roman wall?” It has been often suggested, and in the opinion of the present writer with some probability, that we may. In that case great additional interest attaches to Chesters, Housesteads and others of the ruined Roman stations in Northumberland, when we think that they may have been planned by the exceptional military genius of Agricola. With the three remaining campaigns of this general (A.D. 82–84) we have no special concern, as they were all fought beyond the limits of England. We must not follow him as he cruises about the Kyles of Bute and the Mull of Cantire, gazes across to Ireland (an island, Tacitus thinks, with better harbours and more frequented by merchants than England), nor discuss his opinion, often expressed to his son-in-law, that with one legion and a moderate supply of auxiliaries he could have added Hibernia to the empire. Nor must we linger over Tacitus’ celebrated description of the great fight on the Mons Graupius,[14] and the spirited war-speech of the Caledonian hero Galgacus, which according to Tacitus preceded the encounter. Almost immediately after this victory--perhaps more dearly bought and less decisive than would appear on the surface of the Tacitean narrative--Agricola, whose term of command was already of exceptional length, was recalled to Rome. The Emperor Domitian’s jealousy of a soldier whose admiring legions might insist on proclaiming him as a candidate for the empire, may have been, as Tacitus suggests, the sole reason for his recall; but nearer danger was also threatening Rome from the region of the Danube, and, as Mommsen has pointed out, one of the British legions was actually recalled for service in Pannonia. True statesmanship as well as mean personal jealousy may have prompted the recall of so adventurous a general from the scene of his triumphs. Agricola made no attempt to