[2][6] The second Ferne House was built by Thomas Grove, "on an enlarged scale in the year 1811 on the site of the old structure … in an elevated situation, commanding a pleasing view of the surrounding country".
The house remained in the Hamilton family's possession until the estate was bequeathed by the Duchess to the Animal Defence and Anti-Vivisection Society, for the purpose of maintaining the sanctuary.
[10] Nikolaus Pevsner briefly described the house in his 1963 edition of Wiltshire in The Buildings of England series (incorrectly listed in the parish of Berwick St John).
[11] A clause in the Duchess's will stated that it should remain as an animal sanctuary in perpetuity, but the restrictions she laid down were so stringent, according to The Observer, that the house was unsaleable, and as a result it was demolished in 1965.
[13] A summerhouse in the grounds, called the New Pavilion and also designed by Terry, won the 2008 Georgian Group award for a New Building in the Classical Tradition.