Trinity College in Hartford, Connecticut. Two other notable sources from this time period are extant: a 185-page word list compiled by Antoine-Robert Le Boullenger with about 3,300 items, along with 42 pages of untranslated religious material, and an anonymous 672-page dictionary probably intended as a field lexicon. Despite representing Miami-Illinois as it was spoken more than three centuries ago, these sources are readily intelligible with a knowledge of modern Miami. Probably obtained from the Kaskaskia tribe, among whom the French had set up a mission, these documents doubtless approximate the lingua franca of the Illinois Confederation as a whole. Individual tribes within the Confederation, however, may well have spoken distinct dialects or other languages altogether. The linguistic affinity of the Mitchigamea in particular has been questioned, since Jacques Marquette mentions a Mitchigamea interpreter who understood little Illinois. During the late 18th and early 19th centuries, the Miami-Illinois people experienced a rapid population decline due to introduced diseases, depredations by neighboring tribes (especially the Iroquois), the Northwest Indian War, and subsequent Anglo-American colonisation. In contrast to the French missionary literature, Anglo-American documentation of the language from this period varies widely in both extent and quality. The Miami chief Little Turtle's visit to Philadelphia created some interest in his culture, leading to two word lists of reasonable quality - one apparently commissioned by Thomas Jefferson. The most significant materials of the early 19th century are the linguistic and ethnographic notes of Charles Trowbridge and an anonymous 42-page Wea Primer written for Protestant missionaries in Kansas in 1837. The first migrations out of the original Miami-Illinois heartland took place at this time. By 1832, there were virtually no Miami-Illinois speakers in Illinois; those who had survived the collapse of the previous decades had emigrated to Kansas via Missouri. The formerly diverse tribes of the Illinois Confederation had consolidated, and identified simply as "Peoria" or "Kaskaskia". In 1867, these groups left Kansas and entered the Indian Territory to settle in the Quapaw Agency, where they would be joined by the Piankeshaw and Wea simultaneously forced out of Indiana. The tribes subsequently amalgamated to form the modern Peoria tribe. The Miami proper, meanwhile, split in 1847 between those remaining in northern Indiana and those leaving for Kansas; the latter group moved to the Quapaw Agency in the 1870s, but did not assimilate to the Peoria, and are now incorporated as the Miami Tribe of Oklahoma.