There had been liveried servitors moving through the guests with sweetmeats and liqueurs; drapes of coloured crepe spanning the belvedered ceiling; the air bright with sickly entoptics in the current vogue: seraphim, cherubim, hummingbirds, fairies. He remembered guests: most of them associates of the family; people he either barely recognised or detested, for his friends had been few in number. His father had been late as usual; the party already winding down by the time Calvin deigned to show up. This was normal then; the time of Calvin’s last and greatest project, and the realisation of it was in itself a slow death; no less so than the suicide he would bring upon himself at the project’s culmination.

He remembered his father producing a box, its sides bearing a marquetry of entwined ribonucleic strands.

“Open it,” Calvin had said.

He remembered taking it; feeling its lightness. He had snatched the top off to reveal a bird’s nest of fibrous packing material. Within was a speckled brown dome the same colour as the box. It was the upper part of a skull, obviously human, with the jaw missing.

He remembered a silence falling across the room.

“Is that all?” Sylveste had said, just loud enough so that everyone in the room heard it. “An old bone? Well, thanks, Dad. I’m humbled.”

“As well you should be,” Calvin said.

And the trouble was, as Sylveste had realised almost immediately, Calvin was right. The skull was incredibly valuable; two hundred thousand years old—a woman from Atapuerca, Spain, he soon learned. Her time of death had been obvious enough from the context in which she was buried, but the scientists who had unearthed her had refined the estimate using the best techniques of their day: potassium-argon dating of the rocks in the cave where she’d been buried, uranium-series dating of travertine deposits on the walls, fission-track dating of volcanic glasses, thermoluminescence dating of burnt flint fragments.