The index page for the 1954 French flap section of this site is here.
Reference number for this case: 10-Oct-54-Vigneux-sur-Seine. Thank you for including this reference number in any correspondence with me regarding this case.
[Ref. js1] JEAN SIDER:
French ufologist and author Jean Sider learned in an article from the newspaper Le Courier de Saône-and-Loire, of Châlons-sur-Saône, for October 11, 1954, on page 5, that on October 10, 1954 at 09:00 p.m., from Vigneux-sur-Seine in the Essonne, a luminous flying saucer with port-holes was seen rising vertically without noise by Mr. Marais.
Not looked for yet.
(These keywords are only to help queries and are not implying anything.)
Vigneux-sur-Seine, Essone, Marais, saucer, luminous, port-holes, ascenscion, vertical, silent, night
[---] indicates sources which I have not yet checked.