What is a petroglyph? Who made them and why? What is rock rubbing? How is it made? In her book, Guide to Indigenous Rock Carvings, Beth Hill examines these questions. She gives a fascinating introduction to the subject of First Peoples Petroglyphs of the Northwest Coastal Region - BC, Washington, Oregon and Alaska. Beth Hill and her husband Ray have traveled the coast for close to 20 years, recording the known sites, and discovering others. Out...