Nearby on the right is still more shamanic symbolism in the form of mummy-like figures, as shown in this Mummy Panel, intermixed with smaller well-defined human figures. Polly Schaafsma, author of many books on Indian rock art, states that "Upon viewing these paintings, one cannot help speculating that they were part of some sort of ancestor worship ritual ...." She hypothesizes that the Gallery and its paintings served as a shrine or sacred place for shamanistic activities such as vision quests. These paintings were done by hunter-gatherers and go back to 4,000 B.C.