as the nineteenth century progressed, there were several other important observations about the genealogical structure of the "catalogue". in 1860 adolf kirchhoff noted the mass of information connected to the family of io, a stemma which could be assigned to the third book because of an ancient citation placing phineus, one of her descendants, there. the picture of the "catalogue" that was emerging began to resemble the "bibliotheca" in structure, but theodor bergk was the first to suggest explicitly (though in passing) that the poem might be reconstructed with the help of the mythographic work. bergk and his contemporaries still largely followed marckscheffel's conclusion that the "catalogue" and "ehoiai" were semi-distinct texts, and it was not until 1894 that friedrich leo finally demonstrated that these were in fact alternate titles for a single poem.