12th century English taxation in action
Roger De Hoveden
The Annals vol.2., 1198 AD
"In the same year, Richard, king of England, levied from each carucate or hide of land through out all England five shillings as an aid ; for the purpose of collecting which, the said king sent through each county of England one clerk and one knight ; who, with the sheriff of the county to which they were sent…