Who is Kuriatin, the character Penelope Fitzgerald introduces in Chapter 7?

Kuriatin, the character Penelope Fitzgerald introduces in Chapter 7, is a merchant of the second grade. Kuriatin deals primarily in timber, paper, and wood pulp. With a large, somewhat tumultuous household, the Kuriatin home is not too far from Reid Press. Kuriatin does not have a telephone, so Frank has to stop by or send a message.