I explain my situation to my shipmates, pack a bag with supplies and a wind-up torch, and set off.

Although my uncle could be a thousand miles away, at this depth gravity is almost zero. The cave is wide, and I can travel hundreds of miles in a day! Uncle will be following Arne Saknussemm's cave from one end, and I am coming from the other end. We should meet in the middle!

For weeks I make rapid progress. But the further up I travel, the more gravity affects me. So the slower I climb. The caves begin to grow narrower. I start to notice side caves. I still have a feeling that my uncle is nearby. But is "nearby" a completely different cave?

I begin to think about all the caves I passed. I don't know my way back! I'm lost, deep in the crust of the Earth! Uncle! Where are you!? Where am I?

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