National Geographic : 1914 Aug
Photo by Kolb Brothers WATCHING FOR TIIE SIGNAL FIREI Seventy days after leaving Green River, Wyoming. we built our fire in Bright Angel Creek Canyon, signaling our home, six miles distant, on the opposite rim of the canyon, that we would arrive the next day. The fire was seen the instant it was lit by Mrs. Emery Kolb and her daughter Edith. With the telescope, our two forms could he distinguished sitting by the fire six miles away.