In this February 27, 1803, letter, written by President Thomas Jefferson to the governor of the Indiana Territory, William Henry Harrison, Jefferson directs Harrison to buy land for white settlement from the Native Americans. The Indiana Territory was carved out of the Northwest Territory in 1800. Jefferson instructs Harrison to use trade to run up debt with the Native Americans so that they would be more inclined to sell off some of their lands. Two months later, the Louisiana Purchase was signed, transferring about 828,000 square miles of land west of the Indiana Territory to the United States.