Touch could be sunlight coming through the window and warming Keller's skin, wind blowing on her face, or the coolness of a rainy day. Touch could also be feeling "the smooth skin of a silver birch, or the rough, shaggy bark of a pine." Keller would use her hands to see a sculpture. She recognized her friends by the "feel of their faces" and could tell if they were sad or happy or angry by touching them. Keller's friends and family could call her to a meal by knocking on things near her.