From the middle of your rope, measure from the chin to the bridge of the nose.
Now measure from the bridge of the nose to the crown of the head.
Tie another double coin knot.
Pull the rope down along towards the mouth.
Wind it several times until it reaches the chin.
Pull it back from there and make another double coin knot on the back of the neck.
Tie it off, tightening the head cage.
Isn't it lovely?