Our texts of the two complete extant works of Gorgias (Helen and Palamedes) and of the two attributed, rightly or wrongly, to Alkidamas (Odysseus and On Sophists) are derived entirely from two manuscripts. The one generally known as A is the Cripps manuscript (Burney 95), now in the British Museum, which is a principal authority also for Antiphon, Andokides, Isaios, Lykourgos, and Deinarchos; it contains Helen, Palamedes, and Odysseus, but not On Sophists. The other, known as X, is the Palatine manuscript (Heidelberg 88), which is the principal manuscript of Lysias; it contains Helen Odysseus, and On Sophists, but not Palamedes.