It seems that this mail art envelope sent by John (the UK), has suffered some accidents in way. At least, rain and... a mail monster attack? Because the post service in Casablanca (!) says on the back that it was déchirée ('ripped, torn'). So they tried to repair it with tape, as you can see.
Anyway... it arrived! With a lot of beautiful lighthouses inside, that I will show in another post.