 The stones could be disengaged by means of elm glut boxes (glut box timbers have a slot cut in them to allow the top of the quant (the vertical shaft) to be removed, enabling the stone nuts (pinions), and hence the millstone to be disengaged from the great spur wheel).The mill had four sails which used the Cubitt patent system of a striking lever to the rear so that the shutters could be furled by only removing the weight from the chain to the striking lever.It was winded by a fantail which served to turn the main sails of the mill automatically into the wind.