Soon after leaving Mason and Dixon we strike the first of the great estuaries of the Delaware and Susquehanna, which are the delight of the sportsman, the naturalist and the tourist. No matter at what season of the year you approach North-east, Principio, the Susquehanna River or Stemmer's Run--no matter at what time of the day--the views are always fine. The water spreads out in huge widening bays, and loses itself in the forest or hides behind some projecting headland; and when, as is often the case, the surface of the water is actually darkened with large flocks of wild fowl, the variety as well as beauty of the scene could not be heightened. Such shooting-ground for sportsmen exists nowhere else on this coast easily accessible. At Perryville, Havre de Grace, Bush River and many other places the chance sportsman can find every accommodation, while clubs of gentlemen have leased many of the best points, and established little houses where they may be comfortable when the day's sport is over, and where they can leave from season to season boats, decoys and all the paraphernalia of the sport. To recount the names of canvas-backs, red heads, bald pates and innumerable other ducks, to tell of the tens, fifties, hundreds shot in a single day, would add nothing to the excitement of any sportsman who has seen from the cars the huge flocks of birds rise and sweep out to sea when scared by some passing train or boat. [Illustration: MOUNT ARARAT--PROFILE ROCK.] If every passenger could stop once, and study the Susquehanna bridge crossing the river between Perryville and Havre de Grace, he would have a most profound respect for its projectors and builders. For many years all transport by cars was interrupted here, and travelers and merchandise were transported by ferry-boat, causing wearisome delays and extra expense. But now a bridge 3273 feet long and with 1000 feet of trestling, resting on thirteen huge piers built on foundations in water from twenty-seven to sixty feet deep, and costing a million and a half of dollars, carries all safely over, and defies floods and ice. This bridge, one of the triumphs of engineering and a just source of pride to the road, has already saved in time and trouble a large percentage of its cost. It was threatened the past winter by the ice-pack which filled the river back to Port Deposit, and which seemed to promise for some time the destruction of that well-named little town. It is hard to believe that in a country so extensive as ours, with all kinds of lands and town-sites, any one could begin to build a town in such a situation. It clings to the broken and rocky shores and hillsides as lichens adhere to rocks and to the bark of trees or swallows' nests to the eaves of a barn. There it is, however, and, judging from its costly houses, churches and business appearance, its inhabitants have found it a profitable place to stay in. Port Deposit last winter, when the river was filled with ice from shore to shore