The article below was published in the daily newspaper Le Courrier Picard, France, page 2, on October 21, 1954.
See the case file.
VIENNE, October 20. -- A "Stratojet" plane which, every day, flies over the Rhône valley, at an altitude of around 10,000 meters, was mistaken yesterday by some people for a flying saucer.
The chairman of the Vienna Air Club instructor immediately dissuaded the overly imaginative witnesses, but a strange phenomenon occurred after the passage of the powerful jet plane. In fact, in the sky, kinds of parachutes were created, animated by bizarre movements and having the appearance of light veils which soon reached the ground.
Witnesses of the phenomenon seized this material, very soft to the touch and having a bit the consistency of rubber. On reaching the ground, it evaporated, probably under the influence of temperature.
One of the witnesses put some of the substance in a box and had it photographed immediately. A few hours later, what remained in this waterproof box had evaporated.
This phenomenon, due to the condensation in the cooled and cold atmosphere of certain compounds of the fuel of the "Stratojet" can cause white or rainbow colored formations moving at high speed and at high altitude, and thus give rise to more or less whimsical interpretations.
This observation, made above the airfield of Vienne, is identical to that already reported in its time by a resident of Oloron.