::::He's indeed rather hard to find on Google. I'm still inclined to remove mention of natural Am, Cm, Bk, and Cf from the main periodic table, because the only source seems to be Emsley who got his info from Walter Saxon, and there's no other corroborating paper. We could still leave it as something like "Naturally occurring Am, Cm, Bk, and Cf has been reported, but not confirmed", I guess. (And to everyone who was wondering about that: yes, that makes astatine regain its position as the rarest natural element!)