β. The defendant argues that the murder may have been done by robbers who were scared away before they had robbed the corpse, or by some criminal who feared the dead man’s testimony, or by some other enemy, who felt secure because he knew suspicion would fall on the accused. The slave may have been mistaken or perhaps suborned. If probability is to decide the case, it is more probable that the defendant would have employed some one else to do the murder than that the slave would be certain of having recognized the criminal. The danger of losing a law-suit could not have seemed so serious as the present danger of losing his life. γ. The accuser in his second speech ingeniously meets the arguments of β point by point; and δ. The defendant criticizes and disposes of the arguments of γ, and incidentally mentions that he could prove an _alibi_—though he does not seem to lay any stress on this. With the exception of the evidence of the slave, now dead, the whole case rests on a discussion of probabilities. The Second Tetralogy deals with the death of a boy accidentally killed by a javelin with which another youth was practising in the gymnasium. The question to decide was, who was to blame—the accuser maintained that it was a case of homicide, the defendant suggested unintentional suicide![73] The Third Tetralogy supposes that an old man has been brutally beaten by a young man, and died of his injuries a few days later. The defendant attempts to put the blame first on the dead man, since he struck the first blow, secondly on the surgeon; and, finding this not plausible enough, goes into exile: the second speech for the defence is spoken by a friend of the accused. The extant speeches composed for real cases may be taken in the order of their importance. * * * * * _On the Murder of Herodes._—Herodes, an Athenian citizen who had settled at Mitylene, made a voyage to Aenus in Thrace to receive the ransom of some Thracian captives. He sailed with the accused, a Mitylenean whose father lived at Aenus. They were driven by a storm to shelter at Methymna, and there exchanged from their open boat into a decked vessel. They fell to drinking to pass the time, and Herodes, going ashore one night, was never heard of again. His companion continued the voyage, and on returning to Mitylene was charged with murder. It was asserted that a slave had confessed to having assisted in the murder, and that a letter had been discovered from the defendant to one Lycinus, supposed to be the instigator of the crime.