CHAPTER XX. Incidents of the year 1824--Indian researches--Diverse idioms of the Ottawa and Chippewa--Conflict of opinion between the civil and military authorities of the place--A winter of seclusion well spent--St.Paul's idea of languages--Examples in the Chippewa--The Chippewa a pure form of the Algonquin--Religion in the wilderness--Incidents--Congressional excitements--Commercial view of the copper mine question--Trip to Tackwymenon Falls, in Lake Superior..