a river of Rhaetia Secunda, flowing from west to east, and emptying itself into the Danube. (Pedo Albinov. Eleg. ad Liv.
386, where the common reading is Itargus; others read Isargus, and regard it as the same as the river Atagis (Ἄταγις
) mentioned by Strabo iv. p.207
, with Groskurd's note, vol. i. p. 356.)
It would, however, appear that Ilargus and Isargus were two different rivers, since in later writers we find, with a slight change, a river Ililara (Vita S. Magni,
18), answering to the modern Iller,
and another, Ysarche (Act. S. Cassiani, ap. Resch. Annal. Sabion.
4.7), the modern Eisach,
which flows in a southern direction, and empties itself into the Athesis.