Note 10 — I

The river Tormes rises in the Sierra de Gredos, a range of hills dividing Estremadura from Old Castille, on the confines of the province of Avila. Its chief sources are a large sheet of water called the “Laguna de Gredos,” and a perennial stream called “Tornella.” Receiving several streams from the Gredos hills, the Tormes flows north, passing by Alba de Tormes, where there is a stone bridge; and then turns north-west, passing Salamanca, where there is another fine stone bridge, and Ledesma. Finally, it falls into the Douro, on the Portuguese frontier. The Tormes turns many flour mills.