These included the tract De insidentibus aquae, of which his Latin now holds the place of the lost Greek text.
It was a celebrated bathing-place, under the name of Aquae Gratianae, in the time of the Romans, and possesses numerous ancient remains.
The prisoners at Aquae Sextiae and Vercellae were 90,000 Teutons and 60,000 Cimbri.
Galicia is also remarkable for the number of its sulphur and other warm springs, the most important of which are those at Lugo, and those from which Orense is said to take its name (Aquae urentes).
Not far off are mineral springs by the coast (Neptuniae aquae), known to the Romans and still in use - except one containing arsenic which was blocked up both by the ancients and again in 1839 as a precaution.
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