Gibbon on Morocco in his Time and the Time of the Romans

The genuine Mauritania, or country of the Moors, which, from the ancient city of Tingi, or Tangier, was distinguished by the appellation of Tingitana, is represented by the modern kingdom of Fez. Salle, on the Ocean, so infamous at present for its piratical depredations, was noticed by the Romans, as the extreme object of their power, and almost of their geography. A city of their foundation may still be discovered near Mequinez, the residence of the barbarian whom we condescend to style the Emperor of Morocco; but it does not appear, that his more southern dominions, Morocco itself, and Segelmessa, were ever comprehended within the Roman province. The western parts of Africa are intersected by the branches of Mount Atlas, a name so idly celebrated by the fancy of poets; but which is now diffused over the immense ocean that rolls between the ancient and the new continent.

Edward Gibbon - The Decline And Fall Of The Roman Empire Volume 1