Day 682:
I did sleep overnight in the cave last night and this morning I had the most stiff back ever. It turns out that my body prefers a bed made of chicken skin and feathers over a bed made of gravel, especially a gravel bed under a river in some of the dampest space I’ve ever been in. I’d be shocked if I don’t have some kind of lung fungal infection after that mess.
On the other hand, I found a huge seam of ore and managed to spend the whole day cleaning it out and putting it into trunks to haul to the surface. The trunks are heavy, but storing stuff and then taking it up during daylight is still way safer that working at night.
And because I was essentially carving my own cave, no monsters! Which was nice! I might do it again tonight just to see how far I can get with this cave.