This article was published in the daily newspaper Var-Matin - République, France, le 5 octobre 1954.
A strange apparatus flies over the Mount Blanc
Chamonix, October 4. -- Very numerous people, among whom were the officers of the school of high mountain, the gendarmes of Chamonix and the pilot Guiron, specialist in the flights in high mountain, who flew over the regiment at this time, stated to have seen during more than one hour, a shining apparatus evolving between the Mount Blanc and the Mount Lachat.
pilot Guiron indicated that flying at approximately 2000 meters above Favergas, he saw a machine which, he said, did not have any resemblance to a normal plane. Moreover, the direction followed at high speed by this apparatus excluded the assumption of a weather balloon.
Case file here.