On 10 September 1954, railway worker Marius Dewilde reported a dark object and two small figures near a railway line at Quarouble. The gendarmerie and French Air Police investigated.

Quarouble matters because it is a French 1954 physical-trace encounter with a gendarmerie/Air Police investigation — yet the reported figures remain unverified.
Documented
Marius Dewilde reported a dark object and two small figures
Documented
The gendarmerie and French Air Police investigated
Debated
The identity of the object
Debated
Whether the reported figures were real
Unverified
The figures as established entities
Unverified
Extraterrestrial origin
Sources are kept in separate layers: official and contemporary material is documented; secondary UFO literature is treated as debated, not as primary evidence.
Documented source.
Secondary / debated material.
Secondary / debated material.