Altho the first attempt to conquer the Eddystone had terminated so disastrously, it was not long before another effort was made to mark the reef. The builder this time was a Cornish laborer's son, John Rudyerd, who had established himself in business on Ludgate Hill as a silk mercer. In his youth he had studied civil engineering, but his friends had small opinion of his abilities in this craft. However, he attacked the problem boldly, and, altho his tower was a plain, business-looking structure, it would have been impossible to conceive a design capable of meeting the peculiar requirements of the situation more efficiently. It "was a cone, wrought in timber, built upon a stone and wood foundation anchored to the rock, and of great weight and strength. The top of the cone was cut off to permit the lantern to be set in position. The result was that externally the tower resembled the trunk of an oak tree, and appeared to be just about as strong. It offered the minimum of resistance to the waves, which, tumbling upon the ledge, rose and curled around the tapering form without starting a timber. For forty years Rudyerd's structure defied the elements, and probably would have been standing to this day had it not possest one weak point. It was built of wood instead of stone. Consequently, when a fire broke out in the lantern on December 4, 1755, the flames, fanned by the breeze, rapidly made their way downward. No time was lost in erecting another tower on the rock, for now it was more imperative than ever that the reef should be lighted adequately. The third engineer was John Smeaton, who first landed on the rock to make the surveys on April 5, 1756. He was able to stay there for only two and a quarter hours before the rising tide drove him off, but in that brief period he had completed the work necessary to the preparation of his design. Wood had succumbed to the attacks of tempest and of fire in turn. Smeaton would use material which would defy both--Portland stone. He also introduced a slight change in the design for such structures, and one which has been universally copied, producing the graceful form of lighthouse with which everyone is so familiar. Instead of causing the sides to slope upward in the straight lines of a cone, such as Rudyerd adopted, Smeaton preferred a slightly concave curve, so that the tower was given a waist about half its height. He also selected the oak tree as his guide, but one having an extensive spread of branches, wherein will be found a shape in the trunk, so far as the broad lines are concerned, which coincides with the form of Smeaton's lighthouse. He chose a foundation where the rock shelved gradually to its highest point, and dropt vertically into the water upon the opposite side. The face of the rock was roughly trimmed to permit the foundation stones of the tower to be laid. The base of the building was perfectly solid to the entrance level, and each stone was dovetailed securely into its neighbor.