Something I forgot to mention in the last post: there are intriguing reminiscences between the Orphic hexameters from Sinai and the Proem of the Orphic Argonautika — which are not to be found in the Sacred Discourses in 24 Rhapsodies. (As well as some that are.)

When driven by the goad of Kings Bakchos and Apollon, I described their terrible shafts, and likewise I disclosed the cure for feeble mortal bodies and the Great Rites to initiates. Truly, above all I disclosed the stern inevitability of ancient Chaos, and Time, who in his boundless coils, produced Aether, and the twofold, beautiful, and noble Eros, whom the younger men call Phanes, celebrated parent of eternal Night, because he himself first manifested. Then, I sang of the race of powerful Brimo, and the destructive acts of the Giants, who spilled their gloomy seed from the Sky begetting the men of old, whence came forth mortal stock, which resides throughout the boundless world. And I sang of the service of Zeus, and of the cult of the Mother and how wandering in the Cybelean mountains she conceived the girl Persephone by the unconquerable son of Kronos, and of the renowned tearing of Kasmilos by Herakles, and of the sacred oath of Idaios, and of the immense oak of the Korybantes, and of the wanderings of Demeter, her great sorrow for Persephone, and her lawgiving. And also I sang of the splendid gift of the Kabeiroi, and the silent oracles of Night about Lord Bakchos, and of the sea of Samothrace and of Cyprus, and of the love of Aphrodite for Adonis. And I sang of the rites of Praxidike and the mountain nights of Athela, and of the lamentations of Egypt, and of the holy offerings to Osiris. And also I taught the multitudinous ways prophesying: from the motion of wild birds and from the positions of entrails; how to receive the prophetic dreams that pierce the mind in sleep, and the interpretation of signs and omens and what the motion of the stars means. I taught atonement that brings great happiness for mortals; and how to supplicate the Gods and give offerings to the dead. And I described that which I gained by sight and thought when on the dark way of entering Haides via Taenaron, relying on my cithara, through the love of my wife. And I described the sacred test of the Egyptians in Memphis that is used to convey prophesy, and the sacred city of Apis, which is surrounded by the river Nile.

In fact it also has resonances with one of the other Gold Tablets from Thurii, given here in two translations:

trans. 1
To the First-Born, to Mother Earth, to Cybela, daughter of Demeter.
Zeus, Air, Sun. Fire conquers all.
Avatars of fortune and Phanes. Moirai that remember all. You, O illustrious daimon.
Father who subdues all. Compensation.
Air, fire, Mother, Nestis, night, day,
Fasting for seven days. Zeus who sees all. Always. Mother, hear my prayer.
Fine sacrifices. Sacrifices. Demeter. Fire. Zeus. The Underground Girl.
Hero. Light to the intelligence. The Adviser seized the Girl.
Earth. Air. To the intelligence.

trans. 2
To Earth, first-born Mother, Cybelean Kore said: … [lacuna] …
… of Demeter … all-seeing Zeus.
O Sun, Fire, you went through all towns, when you appeared with the Victories and Fortunes and All-wise Fate, where you increase the brightness of the festival with your lordship, O glorious deity! By you all things are subdued, all things overpowered, all things smitten! The Decrees of Fate must everywhere be endured. O Fire, lead me to the Mother, if the fast can endure, to fast for seven nights and days! For there was a seven-day fast, O Olympian Zeus and all-seeing Sun …