Complex sentence: In 1838 pursuant to the terms of the treaty, Schoolcraft oversaw the construction of the Indian Dormitory on Mackinac Island, which survives and is listed on the National Register of Historic Places.
Split into simpler sentences: In 1838 pursuant to the terms of the treaty, Schoolcraft oversaw the construction of the Indian Dormitory on Mackinac Island. The building is listed on the National Register of Historic Places.