Of noble heritage, Lord Mark has seen his fortune decline somewhat, but he remains among the socially elite of London. He is obviously looking for the correct marriage, and sees this potential in Kate Croy, who may one day inherit her Aunt Maud's estate. He pursues Kate, even though she has indicated no interest in him. When Milly Theale arrives in London, Lord Mark sees another possibility. Lord Mark proposes to Milly as well and even reveals to her that Kate and Densher are secretly engaged, at a time when Milly has been led to believe that Densher loves her. Lord Mark is an opportunistic, insensitive individual, who appears to care only for his own well being.