Following the discovery of a plot to assassinate William III in 1696, Parliament established an association for the defence of the king and in support of the succession. These are the rolls of subscribers to that association.
The records are very detailed and include the names of members of the House of Commons, freemen of city companies, military and naval officers, household, tax and customs officials, judges and members of the Inns of Court and Doctors' Commons, servants of the prince and princess of Denmark, heralds and pursuivants, members of the College of Physicians, and the clergy and gentry in all the counties of England and Wales.
There are separate rolls for some of the colonies and dependencies. Rolls 474-476 are contemporary catalogues.