Wiltshire is a county in South West England. It is landlocked and borders the counties of Dorset, Somerset, Hampshire, Gloucestershire, Oxfordshire and Berkshire. Until 1930 the county town was Wilton, but Wiltshire Council is now based at Trowbridge.
In Realms of the Haunting, shortly after Adam enters the Mansion, we find a 
Scrapbook which contains a newspaper cutting dealing with the recent appearance of crop circles in Helston. According to the article, a team of self-proclaimed experts from Wiltshire has been contacted by the local people to investigate the baffling phenomenon.