Native Americans grew corn, or maize, as a food source. Planted in hills rather than rows, the cobs were square instead of rounded, with two rows of corn on each flat surface. They planted it when the dogwood bloomed and dropped a fish in each hole with four grains—one for the jay, one for the crow, one to rot, and one to grow. Maize was ground into flour by hand in rock mills such as this one on Roaring Run, near the convergence of several Indian paths.