The _Menai_ turned out a great success, and so pleased was her owner, that he commissioned Napier to build him another boat, which was named the _Glowworm_, a vessel of 300 tons and 100 horse-power. She was made ready by 1838. Until Smith was eighty years old the connection thus formed between the two men was continued, and during the period of twenty or thirty years Napier built quite a fleet of steam yachts for his patron. The _Glowworm_ was followed by the _Fire King_ in 1839--this being a 700-ton ship and the biggest of them all. Afterwards came at different dates three _Fire Queens_ (in honour of Queen Victoria, who had come to the throne since the first steam yacht had been launched), the _Jenny Lind_, and the _Sea Serpent_; the latter about 1851. The _Fire King_ was designed with hollow water-lines, and was a vessel possessing considerable speed. Before her trials were run, Smith issued a public challenge in _Bell’s Life_ that she would run against any steamer then afloat, from Dover Pier to the Eddystone Lighthouse and back, for 5,000 guineas, or even higher stakes if desired. One of the three _Fire Queens_ was the fastest vessel of any kind at that time, and possessed the exceptional speed of 16 knots. This was the third vessel of that name, and was built in 1846, her tonnage being 300 and her horse-power 120. She was driven by steeple engines which actuated a screw, and the Admiralty thought so much of her that they purchased her as a packet. Smith, however, did not like the screw, and his next ship reverted to the use of paddle-wheels.