Between Heidelberg and the Duchy of Luxembourg, the Holy Roman Empire forms a hundred-mile-wide salient that protrudes southwards into France, almost as far as the River Moselle. It is called the Saarland and Dr. von Pfung, as a petty noble of the Empire, is accustomed to being able to travel across it freely and safely. As it gets closer to Lorraine, this territory becomes fragmented into tiny principalities. By threading his way between them Dr. von Pfung had intended to make safe passage to Lorraine, which is technically part of the Empire. A brief transit across Lorraine would have brought him across the French border very close to St.-Dizier.