The Vaughan Williams Memorial Library (VWML) is the library and archive of the English Folk Dance and Song Society (EFDSS), located in the society's London headquarters, Cecil Sharp House in Camden Town. It is a multi-media library comprising books, periodicals, audio-visual materials, photographic images and sound recordings, as well as manuscripts, field notes, transcriptions etc. of a number of collectors of folk music and dance traditions in the British Isles. According to A Dictionary of English Folklore, "... by a gradual process of professionalization the VWML has become the most important concentration of material on traditional song, dance, and music in the country."