On my passage, I paid particular attention to the direction which the steamboats took to go to Philadelphia.
You see how it sweeps round the town--forty-nine miles to the Missouri; sloop navigation all the way pretty much drains this whole country; when it's improved steamboats will run right up here.
A hundred years ago, even seventy or eighty years ago, before the age of steamboats and railroads, it was more difficult than at present to define the limits between this class and the next; and, moreover, in defining these limits I emphatically disclaim any intention of thereby attempting to establish a single standard of value for books of travel.