1) Jessyn would ask if she could purchase both the box, and the item she had come for originally. She would save the box for an emergency, then take it back to the shopkeeper.
2) Walking into the camp, calling out to see if anyone was around, Jessyn would then build up the fire and camp for the night, but in the woods just outside the camp, well hidden, to see what if anyone would return.
3) Jessyn would consult with the healers of the city, and find out how to cure the cholera, using potions and magic healing, then teach the healers how to make the potions needed. She would then make some extra potions, use some of them to bribe the guards to let her out of the city, saving at least one dose for herself, just in case.
Jessyn