The Susquehanna now becomes a broad river, and just below flows past Sunbury, the railway outlet of the extensive Shamokin coal district. This town was originally Fort Augusta, built in 1756 to guard the Susquehanna frontier just below the junction of its two branches. In the French and Indian War it had usually a garrison of a regiment, and it was then regarded as the best defensive work in Pennsylvania. After that war it gradually fell into decay, although during the Revolution it was always a refuge for the Susquehanna frontier settlers fleeing from Indian brutality and massacre. Many prominent officers of the Revolutionary army received their military training at this fort. The settlement was originally called Shamokin, from the Indian name of the creek here falling into the Susquehanna--Schakamo-kink, meaning, like Shackamaxon, "the place of eels." For fifty miles below Sunbury the broad Susquehanna winds among the mountain ranges, traversing one after another, until its channel is narrowed to pass through the great Dauphin Gap in the Kittatinny, five miles above Harrisburg, where the river bed has descended to an elevation of three hundred and twenty feet above tide. THE BEAUTIFUL BLUE JUNIATA. A long, low bridge carries the Pennsylvania Railroad across the river in front of Dauphin Gap, and a short distance above, in a delta of fertile islands, the Susquehanna receives its romantic tributary, the Juniata, flowing for a hundred miles from the heart of the Alleghenies, and breaking out of them through a notch cut down in the long ridge of the Tuscarora Mountain. Here is the iron-making town of Duncannon, settled by the sturdy Scotch-Irish, who were numerous along the Juniata and in its neighboring valleys, and who suffered greatly from Indian forays in the early days of the frontier. Upon Duncan's Island, the chief one in the delta, at the mouth of the Juniata, was the place of the council-fire of the Indian tribes of all this region. Now, this island is mainly a pleasure-ground, having spacious and shady groves, while the canal, crossing it from the Susquehanna to the Juniata, goes directly through an extensive Indian mound and burial-place. We will enter the fastnesses of the Alleghenies by the winding gorge of the "beautiful blue Juniata," flowing through magnificent scenery from the eastern face of the main Allegheny range out to the great river. It breaks down ridge after ridge, stretching broadly across the country, and presents superb landscapes and impressive mountain views. The route is a series of bends and gorges, the river crossing successive valleys between the ridges, now running for miles northeast along the base of a towering mountain and then turning east or southeast to break through it by a romantic pass. The glens and mountains, with ever-changing views, give an almost endless panorama. Softness of outline, massiveness and variety, are the peculiarities of Juniata scenery. The stream is small, not carrying a