2. Bruxelles, État Indépendant du Congo, publié par la direction du Musée, en vente chez Spineux, Novembre 1902, in-folio, 144 pages (loose leaves, as issued) + 21 photo engraved plates, kept in the original paper portfolio. Portfolio soiled and stained, first 3 leaves seriously foxed, plates and other text leaves stainless. This is the rare first publication of the '' Musée du Congo'', a scientific institute, founded by the belgian King Leopold II, who was also head of the independant Congo state. This first study deals with the music and the musical instruments of the central African region. Rare.