Everyone likes to be right. When that rightness can be traced back to luck and a bit of intuition – or, if you like, pure accident – then it’s even better.

The contention of The New World Order, though its seventeenth century characters lack the vocabulary and scientific knowledge to work it out, is that around 35,000 BC the majority of a subspecies of the genus Homo disappeared through a wormhole into a parallel Earth. The few that remained soon died out in our world altogether, leaving only tantalising mythological hints, until in the nineteenth century some of their skeletons were discovered and identified in Germany’s Neander valley (or, in German, “Neander thal”). I see you’ve got it.

The ones who left develop a civilisation parallel to ours, in fact slightly ahead, so that when in our seventeenth century they find a way back to this world, calling themselves the Holekhor, they are at…