The Archimedes Palimpsest, that aroused the interest of the scientific community in 1998, contains the so called New Hypereides. Based upon a tentative text-critical reconstruction of the text, Horvath s monograph presents an historical-philological analysis of the newly-discovered speech Against Diondas. Three additional essays complete the volume, one of them containing text and translation of the other newfound speech Against Timandros.