When I read up on how to make paper -- so I could use it if I ever subbed for an elementary art class or some class where the teacher didn't leave lesson plans -- the book said to pour two streams of the paper soup together, then the fibers get oriented along the flow and also tangled for strength.
In 1960-1 in Honolulu at least two seriously bitter streams met -- but there were more, I am sure, Hawaiian ones too.