I believe it’s mythical because a myth is an old often historical story
C) Brussels down handle up because after washing it all the water has to be dryer off before storing back to a dry place or else all the clean paintbrushes will get wet and possibly dirty.
What they did was draw the thing they wanted but like 1 out of 4 half’s and then keep doing that till it was 4 out of 4 paintings and there you go it’s called a diagonal form of art!