What is "riding officer"

The Riding Officer was an occupation common during the 18th century around the coastlines of Britain. The principal duty of the office was to visit the coast within their predefined riding range, to meet and correspond with the other riding officers either in person or by letter, and to inquire and learn if there were any smuggled goods upon the coast, or landed, and to get the best information regarding this booty, and to acquaint the Officers of the Customs all over the shire. He always kept a journal reporting all his activities.

He was paid between twenty to forty pounds a year, and was forbidden to take fees or gratuities. He was also expected to buy, care for and accommodate his own horse. He was appointed by a constitution of the Treasury, and had a deputation from the Commissioner of Customs and Excise. He took the oaths of office, and gave bond and security. He received printed instructions for his conduct with his deputation. He endeavored to get information as to any illicit practices, and makes seizures whenever he could.