. . . . . . . . . . "Power of Congress to establish post offices and post roads" . . . . "Power of Congress to establish post offices and post roads"@en . . . . . . . "State monopolies and restrictions upon commerce, unconstitutional" . "State monopolies and restrictions upon commerce, unconstitutional"@en . . . . . . "Power of Congress to establish post offices and roads" . . . . . . "State monopolies and restrictions upon commerce, unconstitutional : opinion of Mr. Justice Story" . .