The suffixes given to manor houses today have little substantive meaning, and many have changed over time, thus a manor house may have been known as "Heanton House" in the 18th century and in the 19th century as "Heanton Court" and later as "Heanton Satchville". "Court" was a suffix which came into use in the 16th century, and contemporary topographers felt the need to explain the term to their readers. Thus the Devonshire historian Tristram Risdon (d.1640) clarified the term at least three times in his main work, "Survey of Devon":