Cadbury Research Library

The Cadbury Research Library is based at the University of Birmingham and has a very eclectic archive collection.
If you are visiting the area it is well worth checking it's catalogue and archives section.
It holds collections from local people including the Chamberlains, Anthony Eden, the Cadbury brothers and businesses such as Smallwood rulemakers wages books 1884 -99.
It also holds Amateur Athletic Association minutes, information for numerous Sunday Schools, YMCA, Church Missionary Society and Youth Hostels Association records.
As well as the people mentioned above, the personal and family papers archive contain papers such as a journal from an lodging house keeper in Malvern 1870 and a diary of a boy at boarding school 1864 - 1865.
It also contains the British Organ Archive, if any of your ancestors were organ builders.
A fascinating collection, which unfortunately is not online.