Tintin Easter Egg - Author in Scenes

I have been told that in Tintin books, in large crowds, there is the author; Herge. (George Remy)
I haven't looked for him in other Tintin books very hard, but in "The Calculus Affair", when the crowd has gathered outside Marlinspike when the windows have been breaking, in the bottom right corner,there is a tall thin blond man with a pencil and pad of paper. That's him.
I've seen a photo of him, so I'm not mistaken.


Also interesting,in Tintin and the Picaros, Asterix is in the crowd at the carnival.