John Smeaton He pioneered the use of 'hydraulic lime' (a form of mortar that will set under water) and developed a technique involving dovetailed blocks of granite in the building of the lighthouse. His lighthouse remained in use until 1877 when the rock underlying the structure's foundations had begun to erode; it was dismantled and partially rebuilt at Plymouth Hoe where it is known as Smeaton's Tower. Deciding that he wanted to focus on the lucrative field of civil engineering, he commenced an extensive series of commissions, including: Smeaton is considered to be the first expert witness to appear in an English
Knott family and some reflectors were in rather a dirty state. The lightkeepers are comfortably lodged and seem to be well pleased with their situations. The dwelling houses partake of that cleanliness which is general in the cottages of the English." George Knott was the fourth in the succession. After serving under his father at the South Foreland low lighthouse, he was transferred in 1861 to the Smeaton tower on the Eddystone where he remained for five years as Principal Keeper. From there he moved to the little-known Bideford lighthouse where he remained until 1879 when he became Principal keeper of the