But affairs nearer home were every day becoming more disheartening. Haselrig and Morley had gone down to Portsmouth, where they were well received by the governor, and were looked up to as representing the authority of Parliament. Fleetwood sent down troops to oppose them, but the troops themselves went over to them. This success encouraged the apprentices and other dissatisfied persons in London to rise, and demand the restoration of Parliament; and though Colonel Hewson attacked and killed some of them, the spirit and the disturbance only grew the stronger. To finish the matter, Admiral Lawson appeared with the fleet in the Thames, and declared for the Parliament on the 17th of December, and, as soon as they heard this, Haselrig and Morley marched with their forces to London. At their approach the troops in Westminster revolted from the Committee and joined them, declaring that they would live and die with the Parliament. They received those officers who had lately been dismissed, and all marched into Lincoln's Inn Fields, and so to Chancery Lane, where they halted before Lenthall's house, fired three volleys of musketry, and hailed him not only Speaker of the Commons, but Lord-General of the army. This was on Christmas Eve, and Desborough's regiment, which Lambert had sent back to check these counter-movements, on hearing this news, at St. Albans, also declared for the Parliament, and sent the Speaker word of the adhesion. During all this reaction, Fleetwood had still sat with the Committee of Safety, but exhibiting the strangest want of courage and decision. When urged to go and use his influence with the soldiers, to prevent their defection, he fell on his knees and prayed, or declared that it was useless, that "God had spit in his face, and would not hear him."

Whitelock relates that at this juncture he strongly advised Fleetwood to join him and go away to the king, convinced that Monk was deceiving the Parliament, and that the return of Charles was inevitable. He said, therefore, that it was better to get away to him and make terms for themselves and friends whilst the time allowed. Fleetwood was convinced, and ordered Whitelock to prepare for the journey; but Vane, Desborough, and Berry coming in, he quickly altered his mind, and declared that he had pledged his word to Lambert before he marched to do nothing of the kind without his consent. Whitelock repeated that if he did not do it, then all was lost; but Fleetwood, weak but honourable, replied he could not help it; his word was pledged: and in the end he submitted himself to the Parliament.

Lenthall, the Speaker, at the head of a party of soldiers who made themselves merry on their new Lord-General, went into the City, informed the Lord Mayor and Aldermen that the Parliament was assembling, and, on his own authority, ordered from the Tower the governor and officers put there by the Committee of Safety, and placed in command Sir Anthony Ashley Cooper, who had brought in Admiral Lawson, assisted by several members of Parliament. On the 26th of December the Rump met again in that House from which they had been twice so ignominiously expelled. Their first proceeding was to annul their act against the payment of excise and customs, so that they might not be without money, and their next to dismiss Lambert, Desborough, Berry, and other officers, and to order them to retire farther from London; and they ordered Vane, who had adhered to the Committee of Safety, to confine himself to his house at Raby. Thus they were throwing down with their own hands the very bulwarks which should prevent their falling helplessly into the power of Monk and his army. Still more, they sent an order to Lambert's regiments to quit their commander, and retire to such quarters as they appointed. The soldiers having heard of their comrades in the south having gone over to the Parliament, did not hesitate to obey its orders, and Lambert found himself left alone with only about a hundred horse. At Northallerton his officers took their leave of him with tears, and he retired quietly to a house which he had in the country. Thus the expectation of a sharp encounter between Monk and Lambert was at an end, and the road was open to Monk to march to London without opposition.

He had received assurances from Lord Fairfax, that within twelve days he would join him or perish in the attempt, and he forthwith called together his friends, and demanded the surrender of York. On the 1st of January, 1660, the gates of York were thrown open to Fairfax and his followers, and the same day Monk commenced his march southward from Coldstream. Monk remained five days at York in consultation with Fairfax, who did not hesitate to avow his readiness to assist in the restoration of the king. Clarendon tells us that Charles had sent Sir Horatio Townsend to Fairfax, expressing confident hopes of Monk, and requesting him to co-operate with him; and that Parliament had become so apprehensive of him that before his arrival at York they wrote to him, advising him to send back part of his forces, as being needless now in England, while they might prevent danger in Scotland. Monk paid no attention, and the Parliament began to wish him back in Scotland altogether. But it does not appear that Monk in any way committed himself to Fairfax by his words, whatever his conduct might indicate. On the contrary, at York he caned an officer who charged him with a design of bringing in Charles Stuart. On his quitting York Fairfax disbanded his forces, and Monk pursued his march in the same mysterious silence. Parliament had appointed a Council of State, and framed the oath for its members to embrace a most stringent abjuration of royalty and of the Stuart family. The soldiers sympathising with Parliament, the officers on reaching Nottingham proposed signing an engagement to obey Parliament in all things except the bringing in of Charles Stuart. Monk declared this unnecessary, Parliament having expressed itself so strongly on that head; and at Leicester he wrote a reply to certain Royalist petitioners in Devonshire, stating his confidence that monarchy could not be reintroduced, that the excluded members of 1648 could not be safely reinstated, and that it was their bounden duty to obey and support the present Government.

At Leicester arrived two of the most democratic members of Parliament, Scott and Robinson, to watch his proceedings, but ostensibly to do him honour. He received them with all respect, and such was his apparent devotion to Parliament, that they were thoroughly satisfied and highly delighted. At every place he was met by addresses from towns and counties, praying him to restore the excluded members, and procure a full and free Parliament. He replied on all occasions that he was but the servant of Parliament in a military capacity, and referred the applicants to the two deputies for their answers. These gentlemen, who were vehemently opposed to any such restoration of the excluded members, gave very free denials, with which Monk did not in any way interfere.

This conduct, we are assured by Clarendon, extremely confounded Charles and his partisans, who had calculated greatly on Monk's secret inclinations, but the dispersal of Lambert's forces, the retirement of Fairfax, and the vigorous adherence of Monk to Parliament, puzzled and depressed them. It might have been supposed that though Monk had so impenetrably concealed his designs from the adherents of the Commonwealth, that he had a secret understanding with Charles. Clarendon, who was fully in the king's confidence, and his great adviser, solemnly assures us that there was nothing of the kind; that all attempts to arrive at his purpose had been unavailing. By the consent of Charles, Monk's brother, a clergyman in Devonshire, had been induced by Sir Hugh Pollard and Sir John Grenville, the king's agents, to visit the general in the north, and endeavour to persuade him to declare for the king. But Monk took him up very shortly, and advised him to go home and come no more to him with such propositions. To the last moment this secret and solemn man kept the same immovable, impenetrable course. There is little doubt but that he felt, from the miserable weakness and disunion of both the officers and the Parliamentary leaders, the great all-controlling mind being gone, that the king must come again, and that he was ready to do the work at the safe moment. But that till he was positively certain the way was clear of every obstacle, no power on earth should move him. It is probable that he was indifferent to the fact whether the king or the Parliament ruled, but that he would decide for the stronger when it was unmistakably the stronger, and not till then.

To prevent alarm to the Parliament, he brought only five thousand troops with him from York, being much fewer than those which were quartered in London and Westminster; but from St. Albans on the 28th of January he wrote to the Speaker, requesting that five of the regiments there might be removed to other quarters before his arrival, lest there should arise strife between his soldiers and those so lately engaged in rebellion against the Parliament. This startled the Parliament, and dull must those members have been who did not perceive that they committed a series of gross blunders in destroying the greater part of the army, and disbanding their best officers, to clear the stage for a new master. But there was nothing for it but complying. They ordered the regiments to remove, but they refused. Why, they asked, were they to quit their quarters to make room for strangers? Was it expected that they should march away with several weeks' pay in arrear? But their officers, who should have supported them, were dismissed or under restraint, and by coaxing and the distribution of some money, they were induced to go. The greatest difficulty was found with a regiment which occupied Somerset House, and declared they would hold it as a garrison and defend it. But at length they, too, were persuaded to retire, and the next day, the 3rd of February, Monk marched through the City into the Strand and Westminster, where his soldiers were quartered, and himself conducted to Whitehall.

Soon after his arrival Monk, was led to the House of Commons, where a chair was placed for him within the bar, and Lenthall made him an address, applauding his wisdom and services to the Commonwealth, declaring his dispersal of their enemies as a glorious mercy, and returning him thanks. Monk replied, observing that there were demands for a full and free Parliament, but that while it was as well not to impose too many oaths, care must be taken to keep out both the Cavaliers and the fanatic party. Of course, the section of the fanatic party already in the House, with Scott and Haselrig at their head, heard this with resentment; and Monk's sincerity was immediately put to the test by the oath of abjuration of the Stuarts, as a member of the Council of State, being put to him. He parried this, by observing that seven of the councillors already sitting had not taken the oath, and that as for himself, he had given sufficient proofs of his devotion to Parliament. This increased the suspicion against him, and a more explicit proof of his sincerity was put upon him. The Common Council of London had refused to raise money in the City except at the order of a full and free Parliament. The House, therefore, commanded Monk to march into the City to seize ten of the leading opponents in the Council, and to break down the gates and portcullises of the City.

On the 9th of February, two hours after midnight, he received this trying order. If he refused, his commission would be immediately withdrawn, and his plans cut short; therefore he obeyed, and marching into the City, began with all coolness and imperturbability to remove the posts and chains from the streets. The citizens, who expected different conduct from him, and entreated him to desist, assailed his men during their labour with groans and hisses. The posts and chains removed, Monk wrote to the Parliament that he considered that sufficient had been done to crush the spirit of the citizens, but he received a peremptory order to complete the business, which he did by destroying the gates and portcullises, though the soldiers themselves expressed their indignation. He then returned in no agreeable mood to Whitehall. There, however, news awaited him of conduct on the part of Parliament, which seemed to him to show that they now thought that they had made him their pliant instrument, and destroyed at the same time his popularity with the people. Whilst he had been doing this ungracious work in the City, they had been receiving with high approbation a petition from the so-called fanatic or extreme party, headed by the celebrated Barebone, praying that no man might sit in Parliament, or hold any office under Government, who did not take the oath to abjure Charles Stuart, or any single person. This was so plainly aimed at Monk, who had excused himself from this oath, that a council of his officers was at once called, whose resentment of this ungrateful conduct was expressed in a letter drawn up in his name, and despatched to the House the next morning, complaining bitterly of their allowing this attack upon him, and advising that they should take immediate measures for filling up all the vacancies in Parliament, as the only measure which would satisfy the people. To show that this was not a mere admonition but a command, he instantly quitted Whitehall, marched back into the City, summoned again the Common Council, which he had dispersed, and assured them that the conduct of Parliament had now convinced him that they were betraying the interests of the country, that he was sorry he had obeyed them so far as to do injury to "that famous city, which in all ages had been the bulwark of Parliament and of general liberty;" and that therefore he had determined to unite his lot with theirs, and to obtain through them a full and free Parliament.

This announcement was received not only with astonishment, but with enthusiastic expressions of joy. The Lord Mayor and Council plighted their troth with him and the officers, he was invited to dine at the Guildhall, and all the bells in the City were set ringing in exultation. The Corporation attended the general to his lodgings amid the acclamations and the bonfires of the people, at which they roasted rumps in ridicule of the Parliament, and heaped on it every infamy which wit and ribaldry could devise. This coup d'état awoke the Parliament to their blunder; they had made an enemy of the very man and army into whose hands they had put a power which could instantly crush them. There were some zealots, the Haselrigs and Scotts, who advised restoring Fleetwood to the chief command, and bringing back the exiled regiments; but Sunday, which intervened, enabled the more sober counsel to prevail, and they sent a deputation to invite the general to return to Whitehall, and promised that the writs for the excluded members should be ready by the day appointed. But these incidents had made an advance in Monk's proceedings. He had seen, as he came up the country, the universal demand for the restoration of the Long Parliament, and the unmitigated contempt for the present one. He had felt the pulse of the country also as to the return of the king, and his intercourse with the City had only confirmed the impression that the whole body of excluded members must come back as a stepping-stone to the recall of Charles. The Presbyterian interest in the City was as strong as ever, and its enmity to the Independents unabated. He therefore called together his officers to discuss with the deputation the points at issue, and the officers insisted that the excluded members must be restored. Monk then placed the City in a state of defence, and returned to Whitehall. There he summoned the excluded members who were in town, together with the members of the sitting Parliament, and read them a paper, in which he assured them that the people at large demanded a full and free Parliament, as the only means of settling these "bleeding nations." He declared that he would impose no restrictions on them himself, but that his guards should freely admit all the excluded as well as the other members, to take measures for a dissolution of the present Parliament, and the calling of a new one, full and free, on the 20th of April next. He did not believe, he said, that monarchy or prelacy would be tolerated by the people, but that a moderate Presbyterian government, with liberty of conscience, appeared most likely to be acceptable. And as to the Peers, if it were not proper to restore to them their House, yet he thought their hereditary marks of honour should be left them.