In the first half of the nineteenth century, when the Barbary corsairs were finally laid low, a great impetus was given to North African research, and numerous scholars visited and wrote about Carthage. Valiant efforts were made at that time to correlate the statements of ancient authors, chiefly Appian, Diodorus, Justin, Polybius, and Strabo, both with each other and with the existing topography of the peninsula, but the theories propounded had usually little virtue save that of originality and imagination. If excavation was undertaken at all (as it was by Davis, for instance, and Beulé), Roman buildings were often mistaken for Punic, so that elaborate plans of Carthage like Davis's2—to mention but one—are no longer of much consequence.