The united states signed a treaty with which european country to gain the oregon country

It wa signed between the US and Britain. The British gained land in the 49th parallel including the Vancouver Island and the United States received land in the South of the parallel  

Communicating with the dead was common, it wasn’t seen as bizarre or weird,” explains murch. “it’s hard to imagine that now, we look at that and think, ‘why are you opening the gates of hell? ’