A more thorough explanation:

de essendo quietum de theolonio

De essendo quietum de theolonio is a legal term that means "of being quit of toll." It refers to a writ that allows a person who is exempt from paying a toll to enforce their exemption without being bothered or harassed.

For example, if a farmer has a right to pass through a toll gate without paying a fee, they can use a de essendo quietum de theolonio writ to prevent the toll collector from demanding payment or stopping them from passing through. Similarly, if a merchant has a privilege to sell goods without paying a toll, they can use this writ to protect their right and avoid any unnecessary trouble.

These examples illustrate how de essendo quietum de theolonio can be used to protect people from being unfairly charged or harassed for tolls they are exempt from paying.