For other occasional contributions, let me thank:

for the web site

• W3schools
• Alsacréation
• The Site Wizard
• JAlbum for the thumbnails
• Xenu's Link Sleuth
  and many others...

Others

• Pierre Jop for the identification of the location of the view of Martigues
• Armand Launay for the views of Pont-de-l'Arche and les Damps