Ghostbusters sighted a blond- haired boy dressed in blue and heard a woman sighing during a night spent at a 700-year-old pub in Norton St Philip.
The Wiltshire-based Pheonix of Wessex paranormal research team spent last Friday night at The George Inn after reports of spooky sightings.
The George is one of the oldest pubs in the country; past visitors have included Samuel Pepys and the Duke of Monmouth, who stayed at the pub during the Monmouth rebellion in the 17th century, when 12 men were hanged at the nearby crossroads by the infamous Judge Jeffries.
Pub manager for the past 18 months, Mark Jenkinson, has already experienced unexplained happenings such as nine-gallon beer barrels being moved.
There have been a variety of ghost sightings at the pub, including the ghost of a young boy seen in one of the guest rooms.
Also, items have mysteriously moved about in the bar area and guests have reported being woken during the night by extreme cold.
Dave Wichard from the team said the night spent at the pub had been very eventful.
He said: "We took along a medium with us and he saw a child he described as blond- haired wearing blue stockings, breeches and a tunic."
The investigators also placed a line of coins in the former dungeon and locked the room behind them.
"In the morning the coins had been moved.
Mr Wichard said: "At one stage, as we sat quietly in one of the rooms, we distinctly heard the noise of a woman sighing and several members of the team said they experienced what they described as a heavy atmosphere in a number of the rooms.
"It was a very eventful night and we are now examining the photographs and readings we took while we were there."