In 1730 a delegation of Illinois Indians arrived in the French colonial capital of New Orleans. An Illinois leader presented two ceremonial pipes, or calumets, to the governor. One calumet represented the diplomatic alliance between the two men and the other symbolized their shared attachment to Catholicism. The priest who documented this exchange also reported with excitement how the Illinois recited prayers and sang hymns in their Native language, a display that astonished the residents of New Orleans. The "Catholic" calumet and the Native-language prayers and hymns were the product of...