It is therefore erroneous to suppose that the northern Spaniards on their southward march fell in with numerous kinsmen, of wider culture and of a higher civilisation, whose everyday speech was unintelligible to them, and who prayed to Christ in the tongue of Muhammad. Such cases may have occurred, but as the rarest exceptions. Not less unfounded is the theory that Castilian is a fusion of southern academic Arabic with barbarous northern Latin. In southern Spain Latin persisted, as Greek, Syriac, and Coptic persisted in other provinces of the Caliphate; and in the school founded at Córdoba by the Abbot Spera-in-Deo, Livy, Cicero, Virgil, Quintilian, and Demosthenes were read as assiduously as Sallust, Horace, and Terence were studied in the northern provinces. Granting that Latin was for a while so much neglected that it was necessary to translate the Bible into Arabic, it is also true that Arabic grew so forgotten that Peter the Venerable was forced to translate the Ku'rān for the benefit of clerks. Lastly, it must be borne in mind that the variety of Romance which finally prevailed in Spain was not the speech of the northern highlanders, but that of the Muzárabes of the south and the centre. Long before "the sword of Pelagius had been transformed into the sceptre of the Catholic kings," the linguistic triumph of the south was achieved. The hazard of war might have yielded another issue; and to adopt another celebrated phrase of Gibbon's, but for the Cid and his successors, the Ku'rān might now be taught in the schools of Salamanca, and her pulpits might demonstrate to a circumcised people the sanctity and truth of the revelation of Muhammad. As it chanced, Arabic was rebuffed, and the Latin speech (or _Romance_) survived in its principal varieties of Castilian, Galician, Catalan, and _bable_ (Asturian).