Quoted from the Editor's "Introduction to the Theages."
"IN placing in a consecutive order the Theages, Rivals, and Hipparchus, I have followed the arrangement adopted by Stalbaum. For he conceives that they were written, if not by the same hand, at least by a kindred mind, and are all equally unworthy of Plato, despite the attempt made by Socher and Knebel to reverse the judgment of Boeckh, Heindorf, Schleiermacher, and Ast. For though some of the arguments brought forward by the impugners of the dialogue have been refuted, says Stalbaum, by its defenders, yet there still remains evidence enough to prove its spuriousness. For not only is it in matter and manner at variance with the subject and style adopted by Plato, but it contains likewise such remarkable instances of plagiarisms rather than imitation, as to leave little doubt of the writer being only a Plato in disguise; to say nothing of some peculiarities in language, not to be found in the writings of the philosopher and his contemporaries. The dialogue is, however, reckoned amongst the genuine works of Plato by Diogenes Laertius, iii. 57, on the authority of Thrasyllus, a Platonist of the time of Tiberius, as we learn from Suetonius in Tiberius, § 14, and the Scholiast on Juvenal, vi. 576; and it is quoted as such by AElian, V. H. viii. 1. While Lamprias, in the list of the works of Plutarch, n. 68, mentions one, " On the Theages of Plato."
According to Stalbaum, Wympensee, in Diatrib. de Xenocrate, p. 96, conceived that the author of the dialogue was perhaps the philosopher of Chalcedon. But Stalbaum himself feels disposed to refer it to Antipater, who flourished about A. C. 150, and who was the teacher of Panaetius, and the disciple of Diogenes of Babylon, and who wrote, as appears from Cicero de Divinat. i. 3, a work on the wonderful divinations made by Socrates, of which there are some curious instances given in this dialogue; and as both Cicero, and Plutarch in his treatise, On the Daemon of Socrates, seem to have made use of the work of Antipater, so probably did the author of this dialogue."