Terence Rattigan, who wrote the original stage play. This dialogue for this movie has been lifted almost verbatim from Terence Rattigan's script. This is not to detract from David Mamet, whose work I greatly admire (especially the amazing 'Glengarry Glen Ross'). It is an interesting period drama, taking the ideal of 'fair play' to an unusual and unconvincing extreme. The creditable attempts of the excellent cast are unfortunately insufficient to overcome the essential dullness of the text. OK for those who are charmed by customs and manners of Edwardian society.