The course was difficult. I was often lost. I had no map and no phone. I only used the Arago medallions as a guide: the 136 bronze medallions that the Dutch artist Jan Dibbets planted in the asphalt in 1996. But the path was not direct, as I had to navigate many obstacles. There were boulevards, hills, and shopfronts, small houses, the Louvre, the Seine, and cafés that had expanded their premises over the sidewalk.