Jesuit Fathers Pierre De Smet and Adrian Hoecken built the first St. Ignatius mission among the Kalispel and Flathead Indians in eastern Washington. The mission was moved to the Flathead reservation in Montana in 1854.
Lakeshore Country Journal * Catholic Encyclopedia
100 Years in the Flathead Valley: The St. Ignatius Centennial
A. Markham, St. Ignatius' Mission, Montana