On the 25th of November, 1826, a Mr. Thorold, of Great Milton, Norfolk, suggested the application of steam to mail coaches for propelling them on turnpike roads. This plan appears to have been considered feasible, as it is recorded that the plan was not adopted, as it was considered best to wait until the idea was _seen_ in practice. On April 27, 1826, a Mr. Cadogan Williams submitted a plan for the rapid conveyance of mails by means of tubes. The outline of his plan was this: That a square of cast-iron or brick be laid from one stage to another, with its extremities communicating with vaults of sufficient magnitude for the purpose; one vault having an air-evaporating apparatus, and the other a condensing, such as is used to blow iron furnaces worked by steam power. At the neck of the tube joining the condensing apparatus should be two stoppers, on the principle of those that are used in beer cocks. Between the stoppers should be a door for putting in the box of letters. On closing it the stoppers should be turned, and the condensed air would exert itself in the box and produce its rapid movement. This was certainly very ingenious, if somewhat complicated. At any rate, he was informed that his plan was not applicable to the purposes of the department. And now comes a really wonderful proposal. A Mr. Slade, on May 14, 1827, offered to convey the mails at the rate of a mile a minute; but he appears not to have been of a very communicative disposition, as he did not state by what means this very high rate of speed was to be obtained, but he estimated the cost for carrying out his plan at two thousand pounds a mile. As may be supposed, this was considered too visionary and costly to be enquired into further. And now I have got what I think will raise a smile. It will hardly be believed, but so it was, that a Royal Engineer--an officer, I suppose--suggested that the mails should be conveyed by means of shells and cannon. His idea was to enclose the letters in shells and then fire them to the next stage, three miles distant, and then to the next stage, and so on to the end of the journey. He said a good bombardier could drop the shell within a few feet of the spot where the next one was stationed.