" play the Moonlight Sonata "
The Moonlight Sonata is the popular name for the 1801 Piano Sonata No. 14 in C-sharp minor Quasi una fantasia by Beethoven (1770-1827).
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" a Labiche comedy "
Labiche by Marcellin Desboutin
Eugène Marin Labiche (1815-1888) was a French writer. Although he started as a novelist, he found his true vocation writing farces for the stage, producing many successful comedies and vaudevilles.
" to see Une Nuit de Cléopâtre "
Une Nuit de Cléopâtre is the last work by Victor Massé (1822-1884) (see the bookmark to p. 295, "to see the Reine Topaze"). It was not performed until April 1885, nine months after his death.