Trouble With Lichen — John Wyndham

YOU SHOULD LIVE SO LONG...

It had been an inadvertent discovery for lovely Diana Brackley as well as for Francis Saxover. Neither knew the other had perfected the antigerone, but both realized the dangers inherent in such a scientific breakthrough.

There could never be enough of the precious substance for everyone...and that was a secret that had to be kept at any cost. So Diana Brackley and Francis Saxover--each in his own way--decided who would live forever. And they didn't tell anybody. That seemed like a good solution.

But only time would tell...