He endeavored, from this forlorn position, to renew the negotiations for a peace; but every attempt of that kind was frustrated by the Independents, who, though a minority in the House of Commons, possessed great power through the army, and, as already mentioned, were desirous of effecting greater changes in church and state than those for which the war was originally undertaken. Dreading the influence of this body, Charles retired privately from Oxford (May 1646) on the approach of the Parliamentary forces, and put himself under the protection of the Scottish army at Newark.

As the views of the Scotch throughout the war had been steadily confined to the security of the Presbyterian religion, along with the safety of the king’s person and the establishment of a limited monarchy, they received him with great respect at their camp, and entered into negotiations for effecting their grand object. If Charles would have acceded to their views, he might have immediately resumed a great part of his former power; and the agitations of many subsequent years, as well as his own life, might have been spared. But this was forbidden, not only by his strong prepossession in favor of the Episcopal forms of worship, but also by his conviction, that the Episcopal form of church government was alone compatible with the existence of monarchy. He therefore disagreed with the Presbyterians on the very point which they considered the most vital and important.

The American Encyclopedia of History, Biography and Travel — Part 183

From the time when Charles first threw himself into the Scottish camp, the English Parliament had made repeated and strenuous demands for the surrender of his person into their hands. The Scots, however, though acting partly as a mercenary army, asserted their right, as an independent nation under the authority of the king, to retain and protect him. At length, despairing of inducing him to sanction the Presbyterian forms, and tempted by the sum of £400,000, which was given to them as a compensation for their arrears of pay, they consented to deliver up their monarch, but certainly without any apprehension of his life being in danger, and, indeed, to a party quite different from that by which he afterwards suffered. The Scottish army then retired (January 1647) to their native country, and were there disbanded.

The American Encyclopedia of History, Biography and Travel — Part 183