A more thorough explanation:

Definition: Comitatu et castro commisso is a Latin term that means "county and castle commission." It refers to a writ that authorizes a sheriff to take charge of a county and a castle.

Example: In medieval England, the king would issue a comitatu et castro commisso to a sheriff when there was a need to secure a county and its castle. For example, during times of war or rebellion, the king would want to ensure that the castle was well-defended and that the county was under the control of a trusted official.

Explanation: The example illustrates how a comitatu et castro commisso was used in medieval England. The writ gave the sheriff the authority to take charge of the county and castle, which meant that they were responsible for maintaining order and protecting the castle from any threats. This was an important tool for the king to maintain control over his kingdom and ensure that his interests were protected.