 Over a twenty-year span beginning in 1798, their leaders ceded the country west of the lake to the government of Upper Canada via three separate purchase agreements—the Penetanguishene Bay Purchase (1798), the Lake Simcoe–Lake Huron Purchase (1815) and the South Simcoe Purchase (1818).In 1828 the Chippewas numbered approximately "550 souls" under the leadership of "Chief Yellow Head"—the same "Musquakie or Yellow Head, Chief of the Rein Deer Tribe", who was involved in the Lake Simcoe-Lake Huron Purchase and the South Simcoe Purchase.They still occupied their remaining lands about Lake Simcoe and the Holland River, and reportedly had "expressed a strong desire to be admitted to Christianity, and to adopt the habits of civilized life".