The ability to tell a good route from a terrible one is a valuable skill when leading an expedition. Unfortunately for us all, it was a skill I did not possess.
It is not required that we know all of the details about every stretch of the river. Indeed, were we to know, it would not be an adventure, and I wonder if there would be much point in the journey.
When walking alone in a jungle of true darkness, there are three things that can show you the way: instinct to survive, the knowledge of navigation, creative imagination. Without them, you are lost.
We have another chance to navigate, perhaps in a slightly different way than we did yesterday. We cannot go back. But we can learn.