Henry Rowe Schoolcraft was an American geologist, mineralogist, and ethnologist born on December 28, 1793. He is best known for his extensive studies of the geology and natural resources of the United States, particularly in the Great Lakes region. Schoolcraft also played a significant role in the exploration of the Mississippi River and was involved in the early mapping of the Upper Midwest. In addition to his geological work, Schoolcraft is recognized for his studies of Native American cultures. He documented the languages, customs, and histories of various tribes, including the Ojibwe. His writings contributed to the understanding of indigenous peoples in North America during the 19th century.