Thames
Place
Gallic War 5.11 supplies the first indexed source portrait: “… When he had come thither, greater forces of the Britons had already assembled at that place, the chief command and management of the war having been intrusted to Cassivellaunus, whose territories a river, which is called the Thames, separates, from the maritime states at about eighty miles from the sea. …”
Named form in selected editions; identity established only to the extent of the cited context.
Gallic War 5.11
Caesar
… When he had come thither, greater forces of the Britons had already assembled at that place, the chief command and management of the war having been intrusted to Cassivellaunus, whose territories a river, which is called the Thames, separates, from the maritime states at about eighty miles from the sea. …
Gallic War 5.18
Caesar
Caesar, discovering their design, leads his army into the territories of Cassivellaunus to the river Thames; which river can be forded in one place only and that with difficulty. …
Geographical record
Pleiades representative point · precise
The River Thames.
Pleiades 79705 · CC BY 3.0 · Barrington Atlas: BAtlas 8 F3 Tamesis fl.