Criticism of the Horatian ode is in much the same state as it was twenty, or even fifty years ago, although recently the opinion has rightly been gaining ground that Marvell was less ambiguously Cromwellian than older and more sentimentally royalist readers liked to think. However, a belief in Marvell's political impartiality, or in the reluctance of his support for Cromwell, remains almost a sine qua non for anyone who discusses the poem, but I shall try to show that by 1650 Marvell had become completely Cromwellian, and that his theme was Cromwell's election as the constitutional dictator of England, in accordance with the popular concept of the dux bellorum which permitted dictators at the commencement of new empires. My second proposal is that the undeniable impartiality of Marvell's tone and stance derives not from a neutral political attitude, but from the careful rhetorical procedure which Marvell adopted in order to make his theme persuasive to a doubtful audience. The ode is a political or deliberative oration, written to the pattern of such speeches formulated by the classical orators. Deliberative speeches generally dealt with a “difficult” subject, the genus admirabile causae, and frequently began with an insinuatio—a device employed when the opinion of the audience was considered to be prejudiced against the case. But before beginning an examination of the poem and identifying the source of Marvell's brilliant “insinuation,” it would be well to outline very briefly the state of English loyalism in 1649-50, which lends credence to Marvell's position in the ode, and helps to explain how it was possible for a man of integrity to hold opinions so contrary to his earlier royalism.