Lillian Eichler,
Book of Etiquette, Volume 2, Part 4…
(1921)
“ Shakespeare said, "All the world's a stage." If this is true, do we not owe the stage the same courtesy, respect and honor that we owe the world of fellow-men? Be as well-mannered and courteous at the theater and opera as you would in the most fastidious drawing-room. ”
