the card is in very good condition used

Message written in The Lyric Theatre by Herbert ( who guessing might be Herbert Turner ??). The Chocolate Soldier was being performed  ....................  perhaps the sender was very good at writing in the dark ?

The Chocolate Soldier is an operetta composed in 1908 by Oscar Straus based on George Bernard Shaw's 1894 play, Arms and the Man. The German language libretto is by Rudolf Bernauer and Leopold Jacobson. It premiered on 14 November 1908 at the Theater an der Wien.