It didn't take long for the Farmer to lead Gustav towards that little opening to the ground. Gustav had a sprint on his walk thanks to the thought of possibly opening a Coal mine, this can be the most profitable establishment this town could ever experience, if the cave is big enough. He kept walking faster than the Farmer, often slowing down after a portion of speed walking so the farmer can catch on.
When they reached the hole, there wasn't much to see first! It was just a crack measuring about a couple of meters wide and around 5 meters long. This opening wasn't even deep in a mountain or a hill, it was just a crack on a fairly flat land. Which makes this a lot more interesting, because this isn't where one easily finds any Mine in particular. So the cave could likely be very small, or maybe... would need a Century to conquer. There is no inbetween.