The double-artist is one person who uses two kinds of mediums. I limit myself to those who present themselves as a writer and as an artist.
Both disciplines practiced by one person. I would like to examine them in each other's cohesion.
They often are studied in only one aspect; in most cases only the literary work. In my research I see both expressions as equivalent to each other and as two results from the same source.
I am assuming that they also need to be conceived as a unit. If this starting point should be rejected whether applicable as usable or not, is one of the questions that will be examined here.