This proposed departure from old methods naturally met with much opposition, but in 1843 the firm of Howland & Aspinwall commissioned Smith & Dimon, of New York, in whose employ Mr. Griffeths had spent several years as draughtsman, to embody these experimental ideas in a ship of 750 tons named the _Rainbow_. This vessel, the first extreme clipper ship ever built, was therefore, the direct result of Mr. Griffeths’s efforts for improvement. Her bow with its concave water-lines and the greatest breadth at a point considerably further aft than had hitherto been regarded as practicable, was a radical departure, differing not merely in degree but in kind from any ship that preceded her. One critical observer declared that her bow had been turned “outside in,” and that her whole form was contrary to the laws of nature. The _Rainbow_ was designed and built with great care and was not launched until January, 1845. Mr. Griffeths relates a good story about the masting of this vessel. It appears that Mr. Aspinwall, who had an excellent idea of what a ship ought to be, had come to the conclusion that the masting of vessels was a question of no small moment in ship-building, and determined that his new ship should have the benefit of foreign aid in placing the masts. Accordingly, he informed the builders that he would obtain assistance from abroad, for their benefit as well as his own. The builders naturally paid little attention to this information. The port-captain, who was appointed to superintend the construction, was directed by Mr. Aspinwall to select the best authorities in Europe on masting ships. The European experts were written to in reference to this important matter, and after they had duly considered the principal dimensions of the vessel, the trade in which she was to be employed, etc., a spar draft and elaborate calculations were prepared and forwarded to New York. In the meantime, the construction of the _Rainbow_ had progressed steadily. The clamps being ready, the deck beams were placed according to the original drawings, the framing of the decks completed, hatches and mast partners framed, channels and mast-steps secured; the masts and yards were also made and the ship planked and caulked by the time the important despatches arrived. They were examined by the port-captain, Mr. Aspinwall was informed that they were all right, and the port-captain was requested to give the information to the builders, which, of course, was done. The ship, however, was finished without the slightest alteration from the original plans. Mr. Aspinwall, who never doubted that his pet project had been carefully carried out, attributed much of the success of this vessel to the placing of her masts by foreign rules.