Euthyphro (right-minded or sincere) is one of Plato's early dialogues, dated to after 399 BC. Taking place during the weeks leading up to Socrates' trial, the dialogue features Socrates and Euthyphro, a religious expert also mentioned at Cratylus 396a and 396d, attempting to define piety or holiness. Euthyphro has come to lay manslaughter charges against his father, as his father had allowed one of his workers to die exposed to the elements without proper care and attention (3e–4d). This worker had killed a slave belonging to the family estate on the island of Naxos; while Euthyphro's father waited to hear from the expounders of religious law (exegetes cf. Laws 759d) about how to proceed, the worker died bound and gagged in a ditch. Socrates expresses his astonishment at the confidence of a man able to take his own father to court on such a serious charge, even when Athenian Law allows only relatives of the deceased to sue for murder. Plato's sophistication as a writer is evident in his Socratic dialogues; thirty-six dialogues and thirteen letters have been ascribed to him, although 15–18 of them have been contested. Plato's writings have been published in several fashions.