And now a new and alarming class of symptoms began to appear in the distempered body politic. There had been, from the first, in the parliamentary party, some men whose minds were set on objects from which the majority of that party would have shrunk with horror. These men were, in religion, Independents. They conceived that every Christian congregation had, under Christ, supreme jurisdiction in things spiritual; that appeals to provincial and national synods were scarcely less unscriptural than appeals to the Court of Arches, or to the Vatican; and that Popery, Prelacy, and Presbyterianism were merely three forms of one great apostasy. In politics, the Independents were, to use the phrase of their time, root and branch men, or, to use the kindred phrase of our own time, radicals. Not content with limiting the power of the monarch, they were desirous to erect a commonwealth on the ruins of the old English polity. At first they had been inconsiderable, both in numbers and in weight; but before the war had lasted two years they became, not indeed the largest, but the most powerful faction in the country. Some of the old parliamentary leaders had been removed by death; and others had forfeited the public confidence. Pym had been borne, with princely honours, to a grave among the Plantagenets. Hampden had fallen, as became him, while vainly endeavouring, by his heroic example, to inspire his followers with courage to face the fiery cavalry of Rupert. Bedford had been untrue to the cause. Northumberland was known to be lukewarm. Essex and his lieutenants had shown little vigour and ability in the conduct of military operations. At such a conjuncture it was that the Independent party, ardent, resolute, and uncompromising, began to raise its head, both in the camp and in the House of Commons.
The soul of that party was Oliver Cromwell. Bred to peaceful occupations, he had, at more than forty years of age, accepted a commission in the parliamentary army. No sooner had he become a soldier than he discerned, with the keen glance of genius, what Essex, and men like Essex, with all their experience, were unable to perceive. He saw precisely where the strength of the Royalists lay, and by what means alone that strength could be overpowered. He saw that it was necessary to reconstruct the army of the Parliament. He saw also that there were abundant and excellent materials for the purpose, materials less showy, indeed, but more solid, than those of which the gallant squadrons of the King were composed. It was necessary to look for recruits who were not mere mercenaries, for recruits of decent station and grave character, fearing God and zealous for public liberty. With such men he filled his own regiment, and, while he subjected them to a discipline more rigid than had ever before been known in England, he administered to their intellectual and moral nature stimulants of fearful potency.