It is likely that some information about Reading Gaol will
be found in the Quarter Sessions records of the county of Berkshire
(but probably not in the QS records for Reading Borough). The
best class to look at first would be the QS Order Books.
Also check the QS Rolls which contain the various loose
documents produced for and by each Session (ie. Every quarter: Epiphany
/January, Easter, Midsummer / c.Jun and Michaelmas / c.Sep/Oct).
Amongst the various papers are printed lists of prisoners in the
various county gaols with names, ages, crime committed, when and where
convicted, length of sentence - plus other interesting personal
comments.
I believe there are also some books of photographs from the
later 19th century. I haven't looked at these but keep promising
myself that I will 'one day'! (See also the article 'Light in
dark places: photographs of prisoners in Reading Gaol' by Elizabeth
Hughes in the Dec 1999 issue
of the Berkshire Family Historian
Until 1888 the magistrates in the QS were responsible not
only for trying criminal cases (ie. Dealing with cases of law order)
but also with county administration and other matters on behalf of
Parliament, for whom it acted as an intermediary in imposing taxation,
etc.
In this respect the county magistrates in QS were also
responsible for any prisons within their area.
[After 1888 the QS was split into the 'Quarter Sessions' for
law and order, and the county or borough councils for local
administration under the auspices of the County or Town Clerk.
Post 1972, the QS became the 'Crown Court']
There are some police records in the BRO regarding the
Reading Force - they are also one of the many classes of records among
those of the QS.