"an upper middle-class family in full plumage". I half expected this to be a gay party of convivial people. Not.
This is a large family ""no branch of which had a liking for the other". They have gathered to celebrate an engagement yet they appear more like soldiers defending the castle.
Having no personal experience with people of this class and being an American, I am endlessly fascinated by the code of behaviour of the upper classes. It seems to me to be a very
insular society.