Underground is another world with its unique rules. It certainly will not welcome Day-Walkers like Bartlett. If you want to go deeper, you must make a good plan.
On a street in Muya City, while munching on the crispy and sweet apple in his hand, Bartlett was carefully calculating the tools he might need and preparing supplies for the adventure.
Rope? Not really necessary because Dwarf Mage Theodore Goldbright had already given him a very useful magical rope. The magical rope can stretch up to about 60 meters long, which should be about enough.
Sturdy rock nails? This he could buy more of since they could be used in many places. Rock nails not only could fix ropes, also make simple traps and serve as markers to prevent getting lost. If needed, they can even be converted into fishhooks or other hunting tools.