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.
After 1935, stated first American edition on the copyright page of books first published outside the United States, but made no statement on books first published in the United States.) Coward, McCann and Geoghehan. No statement on first editions, but subsequent printings noted. Creative Age.