The only way to stop this evil [white settlement of Indians’ land], is for all the red men to unite in claiming a common and equal right in the land as it was at first, and should be now—for it never was divided, but belongs to all. . . . Sell a country! Why not sell the air, the clouds, and the great sea, as well as the earth?” —Tecumseh in a letter to "Governor William Henry" Harrison, 1810

What does Tecumseh suggest in this letter?