“ The Theiss is clear and swift in its course through the mountains, but in the plain it becomes slow, somewhat muddy and very tortuous. Its basin covers an area of 56,600 sq. m., and comprises the whole eastern part of Hungary, and the greater part of Transylvania, and collects all the rivers descending from the Carpathians westward.
The Theiss is navigable for rafts almost everywhere, but for steamers only from Szolnok downwards, a distance of about 200 m., where the breadth of the river is 450 to 759 ft. The depth of the Theiss at low-water mark is 7 ft. at Tokay, 20 ft. at Szeged and 11 ft. ”

“ Its chief tributaries are the Szamos, Körös, Maros, Latorcza, and the Sajó. In its lower course it is joined to the Danube by the Franz Josef canal, while it is also united with Temesvár by the Bega canal. ”