The 5th verse says if you are “in the wood.” The three references to the wood are: the three woods in the valley below Brown, the wood being the last set of trees before the canyon, and “in the wood” as the hollowed out tree that is the furthest down stream. The triple references to “look down quickly” come when you look down at the tree, then down inside the tree that is down from the others. And, then you are looking in the hollow where Fenn placed the treasure!
And so you may ask why am I giving away the treasure’s location? To paraphrase what Fenn said, “been there, done that.”