at the little colorado the americans proceeded northwest until having to detour around a canyon in which the river flowed through. it was during this detour that the americans discovered the wupatki ruins before making a prolonged turn around the south side of the bill williams mountain. when they reached what was later named union pass, near bullhead city, the party found the colorado. the expedition up to this point was pleasant, the topographers made their maps, the artists drew several pictures of fauna and landscapes and the military men focused on keeping the enthusiasts from staying at one place for too long. after making it only a short distance south down the colorado, captain sitgreaves' men reported signs of natives in the area and soon after they were met by the mohave at their camp. initially peaceful, the mohaves invited the americans to a pow wow where the two groups exchanged gifts and engaged in conversation.