sentences:  Several sources, including Eustachi and Casseri, attribute the discovery of the malleus and incus to the anatomist and philosopher Achillini.The first written description of the malleus and incus was by Berengario da Carpi in his "Commentaria super anatomia Mundini" (1521), although he only briefly described two bones and noted their theoretical association with the transmission of sound.Niccolo Massa's "Liber introductorius anatomiae" described the same bones in slightly more detail and likened them both to little hammers.