The Treadmill - A Chaplain's View
Chaplain's report for 1826 in 'The Prison Chaplain: A Memoir of the Reverend John Clay - late chaplain of Preston gaol by his son, Reverend W.L. Clay, 1961
The tread mill has been constantly at work during the last twelve months, and it still continues to be a source of great terror and a means of severe punishment. It would be improper, however, in the chaplain to conceal that he is disappointed, with regard to many of the prisoners, in the moral effect which he had anticipated from its use. The benefit which might arise from the punishment is counteracted by the disadvantages always attendant upon bringing together a great number of prisoners.