How useful are sources F, G and H as evidence of conditions in the Hertford Gaol in the first half of the nineteenth century?

Source G is an example of a rule from the Hertford Gaol. It says that the prisoners have to be as clean and groomed as possible, if not they don’t get fed. This seems unusual because these rules were published in 1840, before Chadwick’s report which is when people first started to learn about hygiene and cleanness. This source could be seen as reliable because it is official rules, but if could also be considered less reliable because we do not know whether these rules were followed.

Finally source H is a report from the vicar of the Hertford Gaol. He says that prisoner’s attitudes towards life and religion had greatly improved because of the separate cell system. And even the prisoners who had committed great offences could be changed. This source would have been seen as less reliable because as he is a vicar he would want to see the influence of religion therefore his opinion of the improvements would have been one sided. It would have also been seen as less reliable because we do not know whether the prison is always like this. It could have easily been scheduled because they knew an inspector was visiting.