[ClearCase_guy]

During antiquity, lead was a by-product of silver mining and used mainly for coinage. Dr. Hermanns therefore assumes that the lead was used as munitions

The writer's thought process seems to have gone off the rails here.

[KingOfVagabonds]

Ibiza is the dance club capital of the world. I think the divers there are confused amidst all the glo-sticks and used condoms floating offshore.

[SunkenCiv]

I think he meant, the silver was used for coinage, or perhaps the editor mangled it. I’m sure the BBC will correct it once they see the criticism here on FR. ;’D

[null and void]

The writer's thought process seems to have gone off the rails here.

Why else would they need more lead than the silver mines produced as a byproduct?

[bert]

......The meaning of the characters has not yet been determined,...

The message is thought by some to be a warning against eating and contacting lead poisoning. Socioanthropologists specializing in old toxicity mortality records at UMASS are very interested.