what were the beliefs of the inhabitants you mentioned above?
Guardian spirits and shapeshifting or transformation between human and animal spirits
Coast Salish
Belief in guardian spirits and shapeshifting or transformation between human and animal spirits were widely shared in myriad forms. 
what is the geographical location of arlington? In northern Snohomish County, Washington, United States, part of the Seattle metropolitan area from where did the first place get its name? It has a disputed meaning with unclear origins with claims that it meant "lowland people" how is the climate like in the former place we talked about? Dry summers and mild, rainy winters moderated by a marine influence from the Pacific Ocean when was this place explored? 1851 who were the inhabitants during this time? Indigenous Coast Salish peoples name one festival of this area? Annual "Arlington Fly-In" air show one park? County Charm Park and Conservation Area what is the above show about? An annual airshow where thousands of general aviation pilots fly in from around the country showing their aircraft for judging
wiki:10910815
Coast Salish [SEP] Beliefs
Belief in guardian spirits and shapeshifting or transformation between human and animal spirits were widely shared in myriad forms. The relations of soul or souls, and conceptions of the lands of the living and the dead were complex and mutable. Vision quest journeys involving other states of consciousness were varied and widely practised. The Duwamish had a soul recovery and journey ceremony and legends. They also had many ceremonies and celebrations. The Quileute Salish people near the Port Townsend area had their own beliefs about where souls of all living things go. The shamans of these people believed everything had five components to its spirit; the body, an inner and outer soul, its life force, and its ghost.