The year is an educated guess.
A small printed booklet with poetry by Gerrit Kouwenaar and drawings by Constant. They created it in 1949 and it was supposed to be a little joke. This is also one of the lines in the booklet: 'Everyone considers themself to be a joke. A joke is allowed' (Elk voelt zich een grapje, een grapje dat mag) The words and drawings are an expression of the playfullness of their creators where sometimes the words came first and the drawings followed as a reaction and sometimes the other way around.