They left Paris on August 28, 1929, and drove to Brussels, Belgium. Their route then took them to Bonn, Germany, south along the Rhine River to Coblenz, Heidelberg and through the Black Forest. They then went to Switzerland, spending seven days and visiting Zürich, Lucerne, Interlaken, Montreux, and Geneva, and surviving a harrowing crossing of the Furka Pass high in the Alps. From Switzerland the travelers went to Besançon, then to Romagne in France where they visited the American War Cemetery. While the ladies stayed to visit with a mutual friend, Gruber and Eisenhower toured the World War I battlefields in the area. Eisenhower was an expert guide having just completed work on a guidebook for the Battle Monuments Commission. The Grubers and Eisenhowers returned to Paris on September 13.