Yarmouth Castle continued to be used, and records from 1718 and 1760 show it was equipped with eight 6-pound (2.7 kg) and five 9-pound (4.1 kg) guns along the castle and the quay platforms, respectively.[29] Throughout this period it was probably staffed by a captain and six gunners, supported by the local militia.[30] In the early 18th century, Holmes' mansion was rebuilt, forming its current appearance.[31] By the 18th century, however, Yarmouth Harbour had gradually silted up and been destroyed by industrial developments, reducing the value of the anchorage, and the design of the castle had become outdated.[32]