Magic Stone Extraction

"We're digging the tunnels from here. Then we'll escape unnoticed!" Golden-haired George said and pointed to the foot of the wall as he gathered with a group of people.

The group of people nodded. A person asked curiously, "Sir George, we don't have any tools or maps. How do we know if we're digging in the correct direction?"

George was taken back. He pondered for a while and said, "Hmm, your question is constructive, and I've considered this. From my understanding of the terrain, if we dig in this direction, we'll be able to go outside."

Everyone was excited. Another person said, "But, Sir George, where do we displace the soil that we are going to dig?"

George was taken aback. He pondered and said, "It's a good question. I've considered the question before. We can use the opportunity to transport the soil outside using our pockets when we go strolling. Those Underworld creatures will never discover our plan!"