Indian Sentinal: "The Indian Sentinel featured articles about Native Americans across the United States and their evangelization by the Catholic Church. Most were first-hand accounts by lifelong missionaries in the field that were often illustrated with photographs they had taken. Also featured are articles, essays, and letters by Native Americans, many of whom were students in Catholic schools."
Indian Sentinal is a another great digital collection from Marquette University, which also hosts the Jesuit Relations. The magazine is a treasure trove of primary source information about native peoples from Maryland to California--and of course the Northwest. A search for "Spokane" for example turns up 89 articles from 1906 to 1962. Catholic missionaries worked with many or even most Northwest tribes in the 20th century, so most are represented.