The Susquehanna on whose south bank, and near whose mouth, the little town of Havre de Grace was situated, is a noble river. It rises in the State of New-York, where indeed, it will appear by an inspection of the map, many of the principal rivers of the United States find their source. This is the case of the Delaware; and if at any time the people of New-York should become jealous of the prosperity of Philadelphia, they have only to go to the head of that river, which is there a mere brook, and by giving it another direction, deprive that city of its water, and convert it at once into an inland place. I know not whether the citizens of Philadelphia are aware of the practicability of this plan, but at all events I advise them to treat the people of New-York with great attention and respect when they come there, and conciliate them as much as possible.