If you approach Philadelphia by dusty highway, it is quite as appropriate that you come to Baltimore by water highway. A multitude of them run out from her brisk and busy harbor and not all of them find their way to the sea. In fact one of the most fascinating of all of them leads to Philadelphia--an ancient canal dug when the railroad was being born and in all these years a busy and a useful water-carrier. If you are a tourist and time is not a spurring object, take the little steamer which runs through the old canal from the city of William Penn to the city of Lord Baltimore. It is one of the nicest one-day trips that we know in all the east--and apparently the one that is the least known. Few gazetteers or tourist-guides recommend or even notice it. And yet it remains one of the most attractive single-day journeys by water that we have ever taken. If you will only scan your atlas you will find that nature has offered slight aid to such a single-day voyage. She builded no direct way herself but long ago man made up the omission. He dug the Chesapeake and Delaware canal in the very year that railroading was born within the United States. For remember that in 1829 the dreamers, who many times build the future, saw the entire nation a great network of waterways--natural and artificial. They builded the Chesapeake and Delaware canal bigger than any that had gone before. No mere mule-drawn barges were to monopolize it. It was designed for river and bay craft--a highway for vessels of considerable tonnage. * * * * * You arrive at this canal after sailing three hours down the Delaware river from Philadelphia--past the Navy Yard at League island, the piers and jetties at Marcus Hook that help to keep navigation open throughout the winter and many and many a town whose age does not detract from all its charm. The river widens into a great estuary of the sea. The narrow procession of inbound and outbound craft files through a thin channel that finally widens in a really magnificent fairway.