The collection contains official documents, 1634-40, mainly comprising copies of petitions to the king, with related papers, and warrants addressed to Bankes. There are bundles of papers relating to the American colonies; the granting of patents for monopolies and inventions, and charters of incorporation for boroughs and trades. There are bundles of draft proclamations; extracts from medieval records about the levying of contributions for the defence of the realm; recognizances and examinations in Star Chamber cases. There are also estate papers relating to Sir John Bankes's estates in North Lynn, West Lynn and Clenchwarton, Norfolk, c.1622-1650
An outline of the collection, with examples of notable documents, is given in Irving Gray, 'The Lydney Park papers', Quarterly Review, 289 (1951), 55-67, and in D. M. Barratt, 'The Bankes Papers: a first report', Bodleian Library Record, 4 (1952-3), 312-23. A detailed calendar of most of the collection, and an index of the people, places and subjects, are available in the Library.