The Sackville family had arrived at Withyham in 1200 when Jordan de Sackville married Ela Dene, heiress of Buckhurst. The family prospered and began to acquire other estates across East Sussex, whilst maintaining Withyham as their main seat. This expansion reached its peak in the lifetime of Thomas Sackville (1536-1608), Lord Treasurer to Queen Elizabeth 1st, who she created 1st Earl of Dorset, Lord Buckhurst. He created the Terrier to keep a record of his new purchases. However, his political opponents alleged that his wealth came from appropriated money and nicknamed him “Sack-fill”. Today the home of Lord Buckhurst is a ruin with only a single tower surviving. Once it was the “scite, capital mansion and mannor house called Buckhurst being within the park called Great Parck of Buckhurst containing 1150 acres by estimacion”. The estate also had the “Little Parck of Buckhurst containing 520 acres by estimacion”, in which his son, Andrew, lived in another mansion. The route now returns to Hartfield across part of the “Great Parck”, the banks of which still stand several feet high in places.