The experiment was successful--so successful, that when the "stern paddles" were in 1828 used at Leith in a boat twenty-five feet long, with two men to work the machinery, the boat was propelled at an average speed of about ten miles an hour; and the Society of Arts afterwards, in October, 1882, awarded Mr.Wilson their silver medal for the "description, drawing, and models of stern paddles for propelling steamboats, invented by him." The subject was, in 1833, brought by Sir John Sinclair under the consideration of the Board of Admiralty; but the report of the officials (Oliver Lang, Abethell, Lloyd, and Kingston) was to the effect that "the plan proposed (independent of practical difficulties) is objectionable, as it involves a greater loss of power than the common mode of applying the wheels to the side." And here ended the experiment, so far as Mr.Wilson's "stern paddles" were concerned.
It will be observed, from what has been said, that the idea of a screw propeller is a very old one.

Watt, Bramah, Trevethick, and many more, had given descriptions of the screw.

Trevethick schemed a number of its forms and applications, which have been the subject of many subsequent patents.

It has been so with many inventions.

It is not the man who gives the first idea of a machine who is entitled to the merit of its introduction, or the man who repeats the idea, and re-repeats it, but the man who is so deeply impressed with the importance of the discovery, that he insists upon its adoption, will take no denial, and at the risk of fame and fortune, pushes through all opposition, and is determined that what he thinks he has discovered shall not perish for want of a fair trial.