The quotation is from Hector Berlioz's 1859 book "Les Grotesques de la
musique." My source for this information is "A New Dictionary of
Quotations On Historical Principles From Ancient And Modern Sources,"
selected and edited by H.L. Mencken (Knopf, New York, 1962), at page
239. The only differences between your restatement of the quotation
and the version used by Mencken are that in Mencken's version
"slaughterhouse" is one word and there is a comma after "females."
Here is a link to a Web page announcing and describing the first full
English translation of the book, which is being released in February
2005 by the University of Rochester Press:
University of Rochester Press: The Musical Madhouse:English
Translation of Berlioz's Les Grotesques de la musique: Edited by
Alastair Bruce: Introduction by Hugh Macdonald
I own the Mencken reference book in which the quotation is contained
and guessed (correctly, it turned out) that it might be included
If anything is unclear, please ask for clarification before rating the answer.