Ptolemy IV Philopator
The last fragment was preserved by Clement of Alexandria ("Stromata" i. 21, 141), who gives the title of Demetrius' chronicles as Περὶ τῶν ἐν τῇ Ἰουδαίᾳ Βασιλέων (On the Kings of Judea). This fragment endeavors to determine exactly the period of the exile of the Ten Lost Tribes, and that of the tribes of Judah and Benjamin till Ptolemy IV Philopator, in whose reign Demetrius evidently lived.