The house has a longer history than that however, and here's what the National Trust have to say about it's heritage.
History of the house
During the 12th century the house belonged to the Arden family (reign of Richard 1)
"In 1452 it became a manor house for the first time. During the next 20 years, they built a new house, part of which can been seen in the basement of the present building.
Sir Rushout Cullen, the son of a city merchant, bought the house before 1695 and his initials can be seen on the rainwater heads at the rear. He developed the nine bays and two wings of the south front which can be seen today.
The Bumsteads (yep, that's truly their name)
On his death the house was sold to William Bumstead, who added the broken pediment on the north front and the Clipsham stone around the front door in about 1735.
From the Childs to the Bearsteds
In 1757 Bumstead sold Upton to Sir Francis Child, head of a major banking dynasty. Upton remained largely untouched architecturally for the next few years and was inherited as part of a dowry by the Earls of Jersey.
Upton House remained a minor residence, empty or let to tenants of the Earls of Jersey, until in 1894 Upton was sold to Mr Andrew Motion from whom Lord Bearsted brought it in 1927."
Its Diana and Actaeon, in the manner of Joachim Wtewael 1566 -1638
We then head into the Long Gallery (below) which is stuffed with paintings and displays of china. There is a piano with 1930's music on it, and any visitors who can play are encouraged to entertain the rest of us.
It was common to dress boys as girls until about the age of 6, when they were breeched (put into breeches and their locks cut off) Lots of reasons; ease of care when not potty trained, fear of theft of young boys so they were dressed as girls, and right of passage) I believe there was no separate term for boy and girl either...they were all known as girls.
Paintings of church interiors at this period were very much a Dutch fashion, but this is apparently unusual in that it's an accurate drawing of a real church. It's a painting produced from drawings done much earlier in his life.
You can just see some figures, and it's possible these were added later by his pupils and were added to give a sense of scale so that we could appreciate the architecture and also the smallness of man in the presence of God.
The two shapes in the foreground are kneeling, inscribing a gravestone.
This is it's setting in the room....it's to the left of the window frame.
Magnificent hat I thought, though I wouldn't vouch for the brim in heavy rain.
I couldn't find the explanation for this one, although I'm sure it's there somewhere. A beautiful piece of embroidery.
Unfortunately the light was hitting this one from an odd angle and I wasn't able to see or photograph it properly, but it's one of my favourites. The two boys on the right are charming. Twins I think; beautifully and sympathetically painted with life and energy.
I have a video of this area which I shall upload separately.
This whole collection was stolen about 40 years ago but was found in 2002. It was about to be sold at auction in Newcastle upon Tyne, but was returned as soon as it was recognised.
More on the picture room, and dining room in the next postings.