The Sheriff, or 'Scirgerefa', emerged as a crucial instrument of royal authority in the 10th century, serving as the King's direct representative within a shire. Unlike the hereditary Ealdormen, the Sheriff was an appointed official responsible for the execution of justice, the collection of royal revenues, and the leadership of the 'fyrd' or local militia. Following the Norman Conquest of 1066, the office was retained but significantly professionalized; the 'vicecomes' (the Latin equivalent) redirected the local administration to support the centralizing ambitions of the Norman kings, particularly regarding the fiscal demands recorded in the Domesday Book.
In the feudal hierarchy, the Sheriff occupied a unique position, often held by powerful barons who exercised both judicial and military power. They presided over the Shire Court and the Hundred Court, ensuring the King's Peace was maintained. While the office eventually became more ceremonial following the rise of Justices of the Peace and the centralization of the royal courts, the High Sheriff remains the oldest continuous secular office under the Crown, symbolizing the historic fusion of local governance and royal prerogative.