A more thorough explanation:

Justiciarii itinerantes

Justiciarii itinerantes were judges who traveled around England to hear legal cases. They were also known as "justices in eyre."

During the Middle Ages, justiciarii itinerantes were sent by the king to different parts of the country to hold court. They would hear cases and make decisions based on the law. For example, if someone was accused of stealing, the justiciarii itinerantes would listen to the evidence and decide if the person was guilty or not.

Another example is when the justiciarii itinerantes were sent to investigate complaints about the forest laws. These laws were designed to protect the king's hunting grounds, but they were often seen as unfair by the people who lived in or near the forests. The justiciarii itinerantes would hear the complaints and decide if the forest laws were being enforced fairly.

Overall, justiciarii itinerantes played an important role in the legal system of medieval England by traveling around the country to hear cases and ensure that justice was being served.