Many of these drawings were made following the methods passed on from Cecil Collins, for instance using multiple instruments at the same time, and or both hands, maybe not looking or holding a quill pen from the tip of the feather. There was always a model. Control in the normal sense became increasingly difficult, until, if you were lucky, you gave up the idea of control altogether. It’s one of the best lessons I ever learned. Sound scary? Have a go. It’s only a drawing. There will be plenty more.