Sorry, missed this genlock. Fascinating read but as you say, we'll never know.
The following extract from the poem gives a really authentic, if not sinister, picture. Thanks for posting it.
They left behind them, to enjoy the corpses,
the dark coated one, the dark horny-beaked raven
and the dusky-coated one,
the eagle white from behind, to partake of carrion,
greedy war-hawk, and that gray animal
the wolf in the forest