Anytime, really.
Nokou inspected the ziggurat and started chatting with the soldiers (actually, only Nokou was chatting, as the soldiers were either sleeping or looking at him suspiciously, expecting some trick). Then, some boy from the village ran up and said that he hadn't brought water because it was contaminated. While the soldiers were gathering their courage to give the boy a good scolding, Nokou, driven by curiosity, was already rushing towards the well.