That....is a very fair point. It isn't hot here. One would expect volcanic magma to make everything scorching hot. Right. Probably should have noticed that.

"I saw a rock that came from a volcano once." Not at all helpful here, but Arthur had never even left the chain of islands he'd been born on. A volcano is as exotic and alien to him as the moon.

"Ah! I have an idea!"

As a proper Englishman, he never goes anywhere without a handkerchief. Brandishing it, he approaches the edge. His body leans back, as though he still doesn't trust it, and he stretches one long and spindly arm out over the surface of the unnaturally colored lava.

He drops the handkerchief.