Sturminster Newton Castle is a medieval manor house that is said to have utilised the earthworks of an Iron Age hillfort.
There is a.. fascinating tale in Jeremy Harte's Cuckoo Pounds and Singing Barrows (1986).. He writes that a tale of 'a wild and savage Cat', a 'monster cat with eyes as big as tea-saucers' which haunted the hill fort known as Sturminster Newton castle, was extant till the 1820s, for one resident recalled it as a story that terrified both children and adults into avoiding the place at night.
Harte quoted in
Alien Big Cat Sightings in Britain: A Possible Rumour Legend?
Folklore, Vol. 103, No. 2. (1992), pp. 184-202.