The Cole Porter Collection at the Library of Congress provides the researcher with an invaluable look at Porter's creative process and represents a large percentage of his output, particularly of his later works. Eighteen shows are included in the collection representing twenty-one productions, including film versions of stage works. Over 280 song titles are represented, some as incomplete lyric sketches only. The collection is organized chronologically. Comparatively little music is in Porter's own hand. Porter was known to "dictate" his music, playing it out on the piano, with an amanuensis producing the actual music notation. Most of the music manuscripts are either in the hands of copyists or the hand of Porter's amanuenses "considered to be the closest thing to original manuscripts for these songs as exists." With some notable exceptions, such as the letters from George S. Kaufman and Abe Burrows, the majority of the correspondence in the collection is of mostly minor significance--often requests for tickets to shows.