Sir Henry Calcraft was a social acquaintance of JW's. In 1881 he was unmarried and living at 25 St James's Place, London.
Calcraft and JW shared mutual friends; he was, for instance, described by G. W. Smalley as one who 'knows everyone, goes everywhere and is at home everywhere' and 'a professional and indefatigable diner out'. He was Secretary to the Board of Trade and possibly Chairman of the Beefsteak Club.
UK Census 1881 at http://www.familysearch.org/Eng/Search/frameset_search.asp?PAGE=census/search_census.asp(accessed 2004.03); Kelly's London Postal Directory, London; 'A Foreign Resident' [George Washburn Smalley], Society in London, Leipzig, 1885, pp. 133-116; Calcraft, Sir Henry, 'the Greville of his day' in Smalley, George W., London Letters and Some Others, 2 vols., II, London, 1890, p. 99.