Tak-Koo Wah-Kan, or the Gospel Among the Dakotas Stephen Return Riggs ⬩ 1869 History of Congregational mission among the Dakotas: Dakota language and religion (Ta-koo Wa-kan), missionary labors, trials including the 1862 uprising, and conversions. Archive ⬩ Domestic Missions, Non-Christian Religions and Beliefs Download Print