The Thomason Collection of Civil War Tracts consists of more than 22,000 pamphlets, broadsides, manuscripts, books, and news sheets, most of which were printed and distributed in London from 1640 to 1661. The collection represents a major primary source for the political, religious, military, and social history of England during the final years of the reign of King Charles I, the English Civil War, the Interregnum, and the English Restoration of King Charles II. It is now held in the British Library.