Just as the soldiers had speculated in their idle chatter.
Matthew planned to construct a temporary mining base inside the Gold Mine Cave, entrusting the task of mining to the Kobolds.
However, Matthew was not in a hurry at the moment. He had only taken some samples of the gold ore and was preparing to leave the cave with everyone.
Before that, naturally, he needed to erase all traces they had left behind.
The purpose of this was to conceal their tracks, to prevent anyone from following their trail and discovering the place.
Matthew had everyone sign a Magic Contract for profit-sharing and secrecy. After receiving the contracts, everyone was in high spirits.
Of course, after they returned to the surface world, Matthew would certainly need to promote this a great deal more.
One truly buys a horse for its potential, not just its current abilities!
Having ascertained the value of the gold vein, Matthew could now invest in development of the Underworld with confidence.