As professor of geology at the Freie Universität Berlin, Germany, Hillert Ibbeken made endless journeys all over the world. Photography he started as a high-school graduate and recorded, among his other topics, over four hundred human faces in all the visited countries. As a geologist, he usually met people living in the country-side such as farmers, shepherds, fishermen or innkeepers, but hardly a city dweller. With the help of the camera, he tried to capture the many expressive possibilities of the human face, understanding that every face is unmistakable. Illustrations are printed in duotone.