Hidden Treasures of the National Trust, Series 2, Episode 6

At Chirk Castle, a very rare, full-length portrait of a servant from the 18th century reveals its secrets. And in Oxburgh Hall, on the edge of the Norfolk fenlands, two rare hidden treasures - a rat's nest found under floorboards containing scraps of clothes that could be centuries old, and an overlooked portrait tucked away under the stairs - are brought back into the light.