"It could be written only to mentally ill people": why Munk Edward made an inscription in the picture "Shout"

One of the most known pictures in the world is Munk Edward. It was written in 1893. On a cloth the figure which presses hands to the head against the red sky is represented and shouts (at a figure the mouth is open). The picture became one of the brightest embodiments of alarm in world art. The image executed by the Norwegian artist, even served as inspiration for creation of shouting Emoji which can be used today in messages of WhatsApp. But whether you know, what in the picture "Shout" there is a secret message? On a cloth there is an inscription which long time was considered as a riddle. Art critics...