Context
In September 1973, the Doller Valley in Haut-Rhin was a quiet place for a day out. Sewen sits at the head of the valley, below the Ballon d'Alsace. Down in Mulhouse, a small group of mostly young ufologists, the GREI, was collecting sightings from across southern Alsace. It never published a bulletin of its own, but it kept files. This is one of them.