According to medieval statute, the prison was to be managed by two annually elected
Sheriffs, who in turn would sublet the administration of the prison to private "gaolers", or "Keepers", for a price. These Keepers in turn were permitted to exact payment directly from the inmates, making the position one of the most profitable in London. Inevitably, the system offered incentives for the Keepers to exhibit cruelty to the prisoners, charging them for everything from entering the gaol to having their chains both put on and taken off.