1128. They are distinguished from other demons and spirits by causing a kind of suction or pulling in the head, even to the point that the place where the pulling or suction occurs almost hurts. The feeling of suction is as distinct as if the membranes were actually being sucked on. Whether others could stand the pain, there is room for doubt; but because I have long ago gotten used to the pulling actions of spirits and demons, indeed, to quite strong ones, I bore up under these also, without pain.