Be this as it may, let us follow Ptolemy round the coast, keeping in view that he designates a headland by the Greek term ἄκρον, and the Latin ‘promontorium;’ a firth or estuary by εἴσχυσις, and ‘aestuarium;’ a bay or sea loch by κόλπος, and ‘sinus;’ and the mouth of a river by ποταμοῦ ἐκβολαί or ‘fluvii ostia.’ By correcting Ptolemy’s mistake, and restoring the country between the Wear and Solway on the south, and the Tay on the north, to its proper proportion, we can identify the mouth of the river ‘Alaunus’ with that of the Alne, or Allan, in Northumberland; while the next point mentioned by Ptolemy in proceeding along the coast towards the north—the Boderia estuary—is obviously the ‘Bodotria’ of Tacitus, or Firth of Forth. Directly opposite to Boderia, Ptolemy places the Clota estuary, or Firth of Clyde, and the space between the two—the neck of land on which Agricola placed his line of forts—is correct in distance. Between the Ituna estuary or Solway Firth and the Clota or Clyde, Ptolemy has three of the rivers flowing into the Solway—the ‘Novius’ or Nith, the ‘Deva’ or Dee, and the ‘Iena’[57] estuary, or that of the Cree. They can be easily identified, though the intermediate distances are too great. He mentions the river Luce by the name of the ‘Abravannus,’ the promontory of the ‘Novantæ’ or Mull of Galloway, the Rerigonius Bay or Loch Ryan, and Vindogara Bay or that of Ayr. Proceeding northwards along the east coast, we find the peninsula of Fife unduly extended in breadth; but the great feature of the Tava estuary, which bounds it on the north, it is impossible to mistake. Its identity with the ‘Tavaus’ of Tacitus and the Firth of Tay is perfectly clear. The position of the mouth of the river Tina, between the Boderia and the Tava, corresponds with the relative situation of the river Eden, which flows through the centre of Fife, and enters the German Ocean near St. Andrews.