The Milton House Archives consists of a significant collection of letters, documents and other manuscripts related to Roman Catholic recusants in England during the Seventeenth and Eighteenth Centuries. The documents are said to have been at Douai College in France until the French Revolution, when they were taken to England (though this sequence of events was not verified in researching this collection register).
Although it is now impossible to reconstruct the original groupings of the papers with any great confidence, an attempt has been made to divide the collection into coherent parts based either on the probable original provenance or on shared subject matter. For example, the papers here grouped into the Belson Family section include materials that had been separated for auction into separate collections on Thomas White, John Serjeant and Sir George Mackenzie; close examination of these separate collections, however, suggested a common origin, and these documents have been grouped accordingly. On the other hand, items in the George Birkhead section that have no direct connection to him have been retained in that section, as they were received. With few a few significant exceptions then, the collection has been maintained as it was received, though the items have been placed as much as possible into chronological order.