The most distinguished of the master shipwrights of this period was Phineas Pett, sometime master of arts at Emmanuel College, Cambridge, who in 1612 succeeded old Mathew Baker as Master of the guild. Pett, who to a practical knowledge of design and construction added considerable sea experience, rose far above his contemporaries, most of whom were little more than mere carpenters, ignorant of many of the principles which are now accepted as governing ship design, and themselves governed almost entirely by tradition and blind precedent. Science was still in its veriest infancy. The progress of ship design was still by the tentative and costly method of full-scale experience; not till the beginning of the nineteenth century, when new forces and materials had been discovered which in the end spelt the decline and supersession of the sailing ship, did science sufficiently direct the lines on which large sailing ships should be built. By his bold deviation from established usage, says Fincham, Mr. Pett established his fame and advanced the interest and power of the British navy. Before reviewing his handiwork, however, it will be convenient to note the main directions in which improvement was at this period sought. Sir Henry Manwayring, an acquaintance for whom Pett designed and built a pinnace in the year 1616, wrote at this time _The Sea-Man’s Dictionary_. In the early years of the century were also written two treatises which, though not printed till a later date, had great effect in creating an interest in naval matters: Sir Walter Raleigh’s _Observations on the Navy_ and _Invention of Shipping_. In the former paper Sir Walter laid down the six requisites of a good ship: viz. that she should be strongly built, swift, stout-sided, carry out her guns in all weathers, lie-to in a gale easily, and stay well. For the attainment of these qualities he specified certain structural features: a long run forward, to make her sail well; a long bearing floor and a “tumble home” above water from the lower edge of the ports, for stoutness and for stiffness sufficient to enable her to carry her lower ordnance (which must lie four feet clear above water) in all weathers. “It is a special observation,” he wrote, “that all ships sharp before, that want a long floor, will fall roughly into the sea and take in water over head and ears. So will all narrow quartered ships sink after the tail. The high charging of ships it is that brings them all ill qualities.” In the latter paper he recapitulated the various improvements in material of which he had himself been witness; from which for its interest we quote the following extract. “The striking of the topmast (a wonderful great ease to great ships both at sea and in harbour) hath been devised, together with the chain pump ... the bonnet and the drabler. We have fallen into consideration of the length of cables, and by it we resist the malice of the greatest winds that