From the Wikipedia article 
The Derbyshire Record Office, established in 1962, is the county record office for Derbyshire, England. It holds archives for the County of Derbyshire and the City and Diocese of Derby. It is situated in Matlock.
The first County Archivist was Joan Sinar, previously County Archivist at Devon Record Office. She was succeeded by Margaret O'Sullivan. The current Archives and Local Studies Manager is Sarah Chubb.
The website is