from pillar to post

Mr. [Charles] Babbage, in his work on the Economy of Manufactures, suggests a new plan of forwarding the mail. […] Mr. Babbage proposes the erection of pillars along each line of road; these pillars are to be connected by inclined wires, or iron rods, along which the letters, inclosed in cylinders attached to the rods by rings, are to slide; persons stationed on these columns are to forward the cylinders from each point, after having extracted the contents belonging to their own station. In this manner it is calculated that a letter might be sent (from pillar to post), to the farthest limits of the land in the course of a very small portion of time; […]