River in Gallia, earlier called Βρίγουλος (Brígoulos), later Sauconna ; the modern Saône (Ps.-Plut. De Fluminibus 6). Rising in the Vosges (according to Str. 4,1,11; 3,2 the Alps; Ptol. 2,10,4 -- confusion with Isara); navigable from its confluence with the Dubis, with a remarkably slow current, it formed the border between the Haedui and the Sequani (Caes. B Gall. 1,12,1) and joined the Rhodanus near ad Confluentes, opposite Lugdunum.
I. Opelt, A., der Grenzstrom zw. Häduern und Sequanern, in: Gymnasium, 1988, 481-492.