A more thorough explanation:

Definition: Custos Rotulorum is a Latin term that means "keeper of the pleas of the Crown." In history, it referred to the principal justice of the peace in a county who was responsible for the rolls of the county sessions of the peace. This person was also known as the Keeper of the Rolls.

Example: In medieval England, the Custos Rotulorum was responsible for maintaining the records of the county sessions of the peace. These records included information about crimes committed, trials held, and punishments given. The Custos Rotulorum was also responsible for appointing other justices of the peace and overseeing their work.

Explanation: The example illustrates how the Custos Rotulorum was an important figure in the legal system of medieval England. They were responsible for keeping accurate records of legal proceedings and ensuring that justice was served. The Custos Rotulorum's role was crucial in maintaining law and order in the county.