Bezoek aan een olieveld in Purissima Hills in de Verenigde Staten
In 1908 Kessler accompanied the director of Koninklijke Olie (Royal Dutch Petroleum Company, later Shell), Henri Deterding, as secretary on a world tour. He travelled to Canada and the United States via the Dutch East Indies, Singapore, China, and Japan. Dolph’s photo album
contains pictures of an oil field in California, as well as San Francisco’s town hall which had collapsed during an earthquake.