After a study visit to see Vienna's museums and clinics, he visited Italy (1859) and Paris (1860). He returned to Frankfurt as personal physician to the banished Archduke Stephen of Austria at Schaumburg Castle from 1861 to 1863. During the war between Austria, France and Italy in 1859, he became Chief Medical Officer in the military, and on a leave from duty he walked through Northern Italy and the County of Tyrol. After a sabbatical in Paris, he worked with Rudolf Leuckart at the University of Gießen. He graduated as a physician and settled in Frankfurt with a medical practice in 1868.