Debussy wanted to distance himself from what he considered the emotional excess of the Romantics and instead wanted to write music that, through sound, created an ambience similar to that of the Impressionist painters and Symbolist poets of his day.
All books initially copyrighted in the US from 1964 through 1977 have had their copyrights automatically renewed (by law) and the copyrights are still in force. The initial copyright term was 28 years; the renewal was for 67 more years.
The 1909 Act required that all published works carry the Â© symbol or the word Copyright, the year of first publication, and the name of the author in order to receive copyright. Several years may be noted in the case of multiple completion dates - e.g., in the case of further editing.