In addition to his ballets, Benoist did other little odd jobs for the Opera. As a result one day, without thinking, he gave me the key to a deep secret. In his famous _Traite d"Instrumentation_ Berlioz spoke of his admiration for a passage in Sacchini"s _Oedipus a Colone_. Two clarinets are heard in descending thirds of real charm just before the words, '_Je connus la charmante Eriphyle._' Berlioz was enthusiastic and wrote: