Joseph Nelson was the engineer and builder , but the heavy weathered string-course near the base and the blocked and hooded directional-light window show the influence of Daniel Alexander , who succeeded Samuel Wyatt as consulting engineer to Trinity House , and under whom Nelson served .
Joseph Nelson was the engineer and builder . He had served under Daniel Alexander , a Trinity House architect , whose influence can be seen on parts of the design including the heavy weathered string-course near the base and the blocked and hooded directional-light window .