Oscar Wilde, Russell Jackson, Joseph Bristow, Ian Small (2000). “The Complete Works of Oscar Wilde: The picture of Dorian Gray : the 1890 and 1891 texts”, p.336, Oxford University Press on Demand
Impressions of America (1906). The Newark (Ohio) Daily Advocate, 20 Apr. 1883, describes an afterdinner speech made by Wilde in Paris about his experiences in the United States: "The brightest and best of the many stories he related was one to the effect that at a ball in Leadville he saw a notice over the piano which read: 'Please don't shoot the pianist. He is doing his best.' "
The Importance of Being Earnest act 1 (1895). The same lines appear, as a dialogue between Lord Illingworth and Mrs. Allonby, in A Woman of No Importance, act 2 (1893).