It is after dinner on a January night, in the library in Lady Britomart Undershaft's house in Wilton Crescent. A large and comfortable settee is in the middle of the room, upholstered in dark leather. A person sitting on it [it is vacant at present] would have, on his right, Lady Britomart's writing table, with the lady herself busy at it; a smaller writing table behind him on his left; the door behind him on Lady Britomart's side; and a window with a window seat directly on his left. Near the window is an armchair.

Lady Britomart is a woman of fifty or thereabouts, well dressed and yet careless of her dress, well bred and quite reckless of her breeding, well mannered and yet appallingly outspoken and indifferent to the opinion of her interlocutory, amiable and yet peremptory, arbitrary, and high-tempered to the last bearable degree, and withal a very typical managing matron of the upper class, treated as a naughty child until she grew into a scolding mother, and finally settling down with plenty of practical ability and worldly experience, limited in the oddest way with domestic and class limitations, conceiving the universe exactly as if it were a large house in Wilton Crescent, though handling her corner of it very effectively on that assumption, and being quite enlightened and liberal as to the books in the library, the pictures on the walls, the music in the portfolios, and the articles in the papers.

Her son, Stephen, comes in. He is a gravely correct young man under 25, taking himself very seriously, but still in some awe of his mother, from childish habit and bachelor shyness rather than from any weakness of character.