McCarthy was an Irish historian, novelist, journalist and politician.
He was MP for seventeen years, and chairman of the Irish Home Rule party 1890-1896. McCarthy often wrote about Whistler in the press, not always to his approval (see #08085). His books include Ireland since the Union sketches of Irish history from 1798 to 1886, (1887).
Who's Who, London, 1890 et seq.; The Annual Register, London, 1912, p. 101; National Library of Scotland, on-line catalogue, http://main-cat.nls.uk (accessed 2005).