This Protestation was sent across the country of England in 1641 and was signed by individuals aligned with Parliament in several counties. This oath was used as an attack on King Charles I's ministers and advisers and coincided with the Irish Revolt, this revolt caused widespread panic in the English establishment who feared for the Protestant faith.

The form of the protestation was as follows:

"I, A. B., do in the presence of Almighty God promise VOW and protest to maintain and defend as far as lawfully I may with my life, Power and Estate the true Reformed Protestant Religion expressed in the Doctrine of the Church of England against all Popery and Popish Innovations within this Realm contrary to the same Doctrine and according to the Duty of my Allegiance His Majesty's Royal Person, Honour and Estate as also the Power and Privileges of Parliaments, the lawful Rights and Liberties of the Subjects and every Person that maketh this Protestation in whatsoever he shall do in the lawful Pursuance of the same; and to my power and as far as lawfully I may I will oppose and by all good Ways and Means endeavour to bring to condign Punishment all such as shall either by Force, Practice, Counsels, Plots, Conspiracies or otherwise do any Thing to the contrary of any Thing in this present Protestation contained; and further that I shall in all just and honourable Ways endeavour to preserve the Union and Peace betwixt the Three Kingdoms of England, Scotland and Ireland: and neither for Hope Fear or other Respect shall relinquish this Promise Vow and Protestation."