A Dictionary of Music and Musicians/Pinafore, H.M.S.
PINAFORE, H.M.S. A comic opera in 2 acts; words by W. S. Gilbert, music by Arthur Sullivan. Produced at the Opera Comique, Strand, May 25, 1878. The success of this piece has been prodigious: in London it celebrated its 209th night at the Opera Comique on the 24th Oct. 1880; and in America no piece is ever remembered to have had such an extraordinary and long continued reception. It is said to have been on the stage at four theatres at once, in New York alone, for months together.
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