It is difficult at this distance of time to determine exactly what influence the _Ann McKim_ exercised upon the science of ship-building, though from the fact that no ship had ever been built like her, it is probable that she was an object of considerable interest in the maritime world, and it is certain that during the years following her appearance a more determined effort was made in the United States to improve the model and sailing qualities of ships. Among the most notable of these attempts were the _Courier_, already mentioned, built by Donald McKay in 1842, and the _Akbar_, a ship of six hundred and fifty tons, built by Samuel Hall at East Boston in 1839, for John M. Forbes, and others, who employed her in the China trade. On her first voyage the _Akbar_ made the passage from New York to Canton in one hundred and nine days, beating up the China Sea against the northeast monsoon. On this voyage she was commanded by Captain James Watkins, in after years commodore of the Pacific Mail Steamship Co. Later she was commanded by Captain Philip Dumaresq, who made a number of rapid passages in her to and from China. Then came the _Helena_, of 650 tons, built by William H. Webb in 1841. This ship was owned by N. L. and G. Griswold, and also sailed in the China trade under the command of Captain Benjamin, who made some fine passages. The _Paul Jones_, of 620 tons, built by Waterman & Elwell at Medford in 1842, was owned by John M. Forbes and Russell & Co., of China. She was commanded by Captain N. B. Palmer and on her first voyage in 1843 she sailed from Boston for Hong-kong, January 15th, crossed the equator 26 days out, was 54 days to the Cape of Good Hope, 88 days to Java Head, and arrived at Hong-kong 111 days from Boston. In 1848, this ship made the run from Java Head to New York in 76 days. In 1844, A. A. Low & Brother, of New York, contracted with Brown & Bell to build the _Houqua_, of 706 tons, constructed for Captain N. B. Palmer. She made a number of very fast passages. On her first voyage she made the passage from New York to Java Head in 72 days, thence to Hong-kong in 12 days, total 84 days. Her best records from China were as follows: From Hong-kong, December 9, 1844, passed Java Head 15 days out, was 70 days to the Equator in the Atlantic, thence 20 days to New York, total 90 days--distance by log, 14,272 miles. December 9, 1845, sailed from Hong-kong, passed Java Head 16 days out, arrived at New York, March 10, 1846, 91 days’ passage. Under the command of Captain McKanzie, in 1850, she made the passage from Shanghai to New York in 88 days, the shortest passage up to that time. This ship was named in honor of Houqua, the well-known Canton merchant who was beloved and respected by American and English residents in China, no less for his integrity than for his great kindness and his business ability.