What is post horse?

Famous quotes containing the words post and/or horse:

    A demanding stranger arrived one morning in a small town and asked a boy on the sidewalk of the main street, “Boy, where’s the post office?”
    “I don’t know.”
    “Well, then, where might the drugstore be?”
    “I don’t know.”
    “How about a good cheap hotel?”
    “I don’t know.”
    “Say, boy, you don’t know much, do you?”
    “No, sir, I sure don’t. But I ain’t lost.”
    William Harmon (b. 1938)

    The horse is taught his manage, and no star
    Of wildest course but treads back his own steps;
    William Wordsworth (1770–1850)