The reservoir of the Old Welsh Harp was close at hand--a place
famous for its water-birds and wild fowl.
Smith made many models of boats, his experiments extending over
many years. In 1834, he constructed a boat propelled by a wooden
screw driven by a spring, the performance of which was thought
extraordinary. Where he had got his original idea is not known.
It was floating about in many minds, and was no special secret.
Smith, however, arrived at the conclusion that his method of
propelling steam vessels by means of a screw was much superior to
paddles--at that time exclusively employed. In the following
year, 1835, he constructed a superior model, with which he
performed a number of experiments at Hendon. In May 1836, he
took out a patent for propelling vessels by means of a screw
revolving beneath the water at the stern. He then openly
exhibited his invention at the Adelaide Gallery in London. Sir
John Barrow, Secretary to the Admiralty, inspected the model, and
was much impressed by its action. During the time it was
publicly exhibited, an offer was made to purchase the invention
for the Pacha of Egypt; but the offer was declined.
At this stage of his operations, Smith was joined by Mr. Wright,
banker, and Mr. C. A. Caldwell, who had the penetration to
perceive that the invention was one of much promise, and were
desirous of helping its introduction to general use.
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