The first objects of note to arrest our attention below Belgrade are the great ruined fortress of Sendria and, further downstream, the ruins of the two castles of Galambocz and Laszlovar. These massive strongholds, located on opposite sides of the river, guarded what was long known as “The Key of the Danube.” They, like the scores of ruins which we have passed on our way from Ratisbon, are rich in historic and legendary associations of the most interesting character. Near Galambocz is shown a great cavern, in which, legend has it, St. George slew the dragon. When we reflect that practically nothing is known of the patron of chivalry and the champion of Christendom, except that he suffered martyrdom at or near Lydda in Palestine before the time of the Emperor Constantine, it becomes difficult to account for the existence of this dragon-slaying tradition in this spot. Its origin may be due to pilgrims or Crusaders, who brought it from the Holy Land in the same way as they popularized the _cultus_ of the Saint in England as early as the days of Arculph and Richard Coeur de Lion. But after all, it is no more difficult to account for the contest between St. George and the dragon here than at “a stagne or a pond like a sea,” near Silena in Libya, as we read of it in Caxton’s version of the _Legenda Aurea_, or, to explain the associations of the martyr-knight with the Order of the Garter, the Union Jack or the white ensign of the British Navy. Immediately below Galambocz we enter the wildest and grandest scenery along the Danube. The foaming rapids and the towering cliffs of the gorge of Kazan recall the famed cañons of Colorado or Montana, although in magnitude and grandeur it is far inferior to the stupendous gorges of the Arkansas or the Yellowstone. But far more interesting to me than the gorge itself was an inscription at the lower end which is cut in the solid rock and commemorates the completion of the marvelous roadway which the Romans constructed along the western face of this formidable defile. To me it seemed one of the most extraordinary of all the countless achievements of imperial Rome in the entire length of the Danube valley. The inscription reads: IMP. CÆS. D. NERVÆ. FILIUS. NERVA. TRAJANUS. AUG. GERM. PONT. MAX....