A more thorough explanation:

Agillarius

Agillarius is a historical term that refers to a person who was responsible for taking care of a herd of cattle in a common field. They were also known as haywards.

For example, in medieval England, agillarius was an important role in managing the common fields. The agillarius would ensure that the cattle were properly fed and watered, and that they did not stray from the designated grazing areas. They would also be responsible for maintaining the fences and gates that kept the cattle in the common field.

Another example of an agillarius can be found in ancient Rome. The agillarius was responsible for managing the herds of cattle that were used in religious ceremonies and sacrifices. They would ensure that the cattle were healthy and well-fed, and that they were properly prepared for the rituals.

These examples illustrate how the role of an agillarius varied depending on the time and place. However, in general, an agillarius was someone who was responsible for taking care of a herd of cattle in a common field or for religious purposes.