Duro-brivæ, Rochester on the Medway, (Briva or Brivis, the ancient Celtic for a Town.) Duro-levum, Milton on the Thames. Lan-du-b-r-is, a Portuguese Island. Lan, a Bank of a Stream, or the Sea: also an inclosed Space, (_Welsh._) Tur-ones, the inhabitants of the country at the junction of several streams with the Loire, the neighbourhood of the modern Tours. Bi-tur-ig-es, from Bi “Two,” Tur or Dour, Water, and trigo, to reside. There are two tribes of this name in Gaul; the Bituriges Cubi, situated between two of the branches of the Loire, and the Bi-turi-ges Vobisci, between the Garonne and the Sea, at the junction of the Dordogne and the Garonne. Cat-ur-iges, from Catti, Tribes or People; Dour, Water, and Trigo, to reside; on the Durentia, South-east of France, about Embrun or Eburo-Dunum, which was their principal town. Cad-ur-ci, from Catti, Tribes, and dur. There is one tribe of this name on the Dordogne, and another contiguously placed on the Garonne. The mutual support that these interpretations give to each other will be obvious. The following Irish word for “Water,” which is not extant in the Welsh, may be traced in Celtic regions in its various modifications: Uisge (_Irish_), “The Usk” (_South Britain_)—Eask(60) (_Irish_, obsolete), “The Esk” (_Scotland_), “The Escaut” (_North of France_), Isca, “The Exe” (_South Britain_)—Easkong (_Irish_, obsolete), Axona (_Gallia_, _Belg._), “The Aisne,” Axones, the neighbouring tribe. Names Of Estuaries, Or Mouths Of Streams. The terms of this class, which occur in ancient Gaul, &c., consist either of terms still thus applied in the living Celtic dialects, or of compounds of which the elements may be recognized, unchanged, in those dialects. Moreover it will be highly interesting to observe that these terms, for the most part, consist of Metaphors derived respectively from the same sources as the two English words “Estuary” and “Mouth,” and the two Latin words “Æstuarium” and “Os Fluminis.” One of the principal arguments of those writers who maintain that the separation of the Irish from the other Celtic tribes must have been of remoter date than the first peopling of these islands, is founded on the fact that the Irish use the word In-ver for the Mouth of a Stream, while the Welsh use Ab-ber (spelt Aber); a feeble support for so wide a conclusion, which a correct analysis of these terms, and a comparison of some interesting coincidences in the local names of ancient Gaul will show to be utterly futile! In-ver and Ab-ber are not simple but compound terms, literally corresponding to the Latin expression “Fluminis Æstuarium.” Æstuarium is from Æstuo, “To boil,” a metaphorical term, obviously derived from the agitation of the Waters where two Streams meet, or where a River enters the Sea.