LSE4329880 A bongo concert, possessing a wide variety of musical instruments, here, four young men execute a quartet with trumps (hollowed in the stem of a tree) and drums (hollow in a tamarind ball), engraved after O.Mathieu\'s drawing, illustrating a journey to the heart of Africa, in 1868-1871, by Dr. George Schweinfurry, published in ??????Le tour du monde??????1874, edited by Edouard Charton, Hachette edition, Paris. Selva Collection. by Mathieu, Oscar Pierre (1845-1881); Private Collection; (add.info.: A bongo concert, possessing a wide variety of musical instruments, here, four young men execute a quartet with trumps (hollowed in the stem of a tree) and drums (hollow in a tamarind ball), engraved after O.Mathieu\'s drawing, illustrating a journey to the heart of Africa, in 1868-1871, by Dr. George Schweinfurry, published in ??????Le tour du monde??????1874, edited by Edouard Charton, Hachette edition, Paris. Selva Collection.); Photo by Leonard de Selva.