This portrait
The American-born novelist Henry James settled in England, at Lamb House, Rye, in 1898. By the time this portrait was painted he was at the end of a career which had seen the success of early novels such as Portrait of a Lady (1881), followed by the late masterpieces The Wings of the Dove (1902) and The Golden Bowl (1904). This portrait was commissioned to celebrate James's seventieth birthday by a group of 269 subscribers organised by the American novelist Edith Wharton, although ultimately Sargent, a fellow American and friend, waived his fee. When it was completed James pronounced the portrait to be 'a living breathing likeness and a masterpiece of painting'.
Source: NPG London
http://www.npg.org.uk/collections/search/portrait/mw03436/Henry-James#artist