Whilst Lord Mar remained near the court, the discoveries made by the Earl of Stair in France, communicated the first surmise of an intended invasion of England. Several seizures of suspected people warned one who was deep in the intrigues of St. Germain, not long to delay the open prosecution of his schemes. The melancholy instance of Mr. Harvey, who was apprehended while he was hawking at Combe, in Surrey, alarmed the Jacobite party. Mr. Harvey being shown a paper written in his own hand, convicting him of guilt, stabbed himself, but not fatally, with a pruning-knife which he had used in his garden. Upon some hope of his confessing being hinted, it was answered that his Majesty and the Council knew more of it than he did. The celebrated John Anstis, the heraldic writer, was also apprehended, and warrants were issued for the seizure of other suspected persons.

Notwithstanding his strong family interest, the Earl of Mar could scarcely consider himself secure under the present state both of the country and the metropolis. The events of the last year had succeeded each other with an appalling rapidity. The flight of Bolingbroke had scarcely ceased to be the theme of comment, before the general elections excited all the ill blood and fanaticism which such struggles at any critical era of our history have always produced. Riots, which have been hastily touched upon in the histories of the period, but which the minute descriptions of memoirs of that period show to have been attended with an unusual display of violence and brutality on both sides, broke out upon every anniversary which could recall the Stuarts to recollection. On St. George's day, in compliment to the Chevalier, who, according to an observer of those eventful days, "had assumed the name of that far-famed Cappadocian Knight, though every one knew he has nothing of the valour, courage, and other bright qualities of the saint," a tumult was raised in London, and among other outrages, passengers through the streets of the City were beaten if they would not cry "God bless the late Queen and the High Church!" Sacheverel and Bolingbroke were pledged in bumpers by a mob, who burnt, at the same time, King William in effigy.[66] A similar contagion spread throughout the country; Oxford took the lead in acts of destruction; her streets were filled with parties of Whigs and Tories, both of them infuriated, until their mad rage vented itself in acts of murder, under the pretence, on the one hand, of a dread of popery, on the other, on a similar plea of religious zeal. A Presbyterian meetinghouse was pulled down, and cries of "An Ormond!" "A Bolingbroke!" "Down with the Roundheads!" "No Hanover!" "A new Restoration!" accompanied the conflagration. On the same day similar exclamations were again heard in the streets of London; and all windows not illuminated were broken to pieces. The tenth of June, the anniversary of the Chevalier's birthday, was the signal for a still more decisive manifestation. On that day three Scottish magistrates went boldly to the Cross at Dundee, and there drank the Pretender's health, by the name of King James the Eighth, for which they were immediately apprehended and tried.

The impeachment of Lord Oxford still further exasperated the country, which rang with the cry, "No George, but a Stuart." The peaceable accession of the first monarch of the Brunswick line has been greatly insisted upon by historians; but that stillness was ominous; it was the stillness of the air before a storm; and was only indicative of irresolution, not of a diminished dislike to the sway of a foreigner.

It is supposed that an intercepted letter which the Duke de Berwick, the half-brother of the Chevalier, addressed to a person of distinction in England, first gave the intelligence of an intended invasion.[67] The burden of that letter was to encourage the riots and tumults, and to keep up the spirits of the people with a promise of prompt assistance. The impeachment of Viscount Bolingbroke and of the Duke of Ormond followed shortly afterwards; and although these noblemen provided for their own safety by flight, they were degraded as outlaws, and in the order in Council were styled, according to the usual form of law, "James Butler, yeoman," and "Henry Bolingbroke, labourer," and the arms of Ormond were taken from Windsor Chapel, and torn in pieces by the Earl Marshal.

The English fleet, under the command of Sir George Byng, was stationed in the Downs, in case of a surprise. Portsmouth was put in a state of defence; and, during the month of July, the inhabitants of London beheld once more a sight such as had never been witnessed by its citizens since the days of the Great Rebellion. In Hyde Park the troops of the household were encamped, according to the arrangements of General Cadogan, who had marked out a camp. The forces were commanded by the Duke of Argyle. In Westminster the Earl of Clare reviewed the militia, and the trained bands were directed to be in readiness for orders. At the same time fourteen colonels of the Guards, and other inferior officers were cashiered by the King's orders, on suspicion of being in James Stuart's interest; so deep a root had this cause, which many have pretended to treat as a visionary scheme of self-interest, taken in the affections even of the British army.

A proclamation ordering all Papists and reputed Papists to depart from the cities of London and Westminster, was the next act of the Government. All persons of the Roman Catholic persuasion were to be disarmed and their horses sold; a declaration against transubstantiation was to be administered to them, and the oath of abjuration to non-jurors.[68] After such mandates, it seems idle to talk of the tyranny of Henry the Eighth.

There is no doubt but that the greatest alarm and consternation reigned at St. James's. The stocks fell, but owing to the vigilance of the Ministry, information was obtained of the whole scheme of the invasion, in a manner which to this day has never been satisfactorily explained.

The Earl of Mar must have trembled, as he still lingered in the metropolis. It is probable that he waited there in order to receive those contributions from abroad which were necessary to carry on his plans. He was provided at last with no less a sum than a hundred thousand pounds; and also furnished with a commission dated the seventh of September, 1715 appointing him Lieutenant General and Commander in Chief of the forces raised for the Chevalier in Scotland.[69] Large sums were already collected from Switzerland, Italy, Germany, and France, to the amount, it has been stated, of twelve millions. It has been well remarked by Sir Walter Scott, in his notes on the Master of Sinclair's MS., that "when the Stuarts had the means, they wanted a leader (as in 1715); when (as in 1745) they had a leader, they wanted the means."

With the eye of suspicion fixed upon him, his plans matured, his friends in the north prepared, the Earl of Mar had the hardihood, under such circumstances, to appear at the court of King George. A few weeks before the Habeas Corpus Act had been suspended; but the Earl trusted either to good fortune, or to his own well-known arts of insinuation. He braved all possibility of detection, and determined to carry on the game of deep dissimulation to the last moment.

On the first of August, 1715, the Earl of Mar attended the levee of King George. One can easily suppose how cold, if not disdainful, must have been his reception; but it is not easy to divine with what secret emotions, the subject on the eve of an insurrection could have offered his obeisance to the Monarch. Grave in expression, with a heavy German countenance, hating all show, and husbanding his time, so as to avoid all needless conversation; without an idea of cultivating the fine arts, of encouraging literature, or of even learning to speak English, George the First must have presented to his English subjects the reverse of all that is attractive. A decided respectability of character might have redeemed the ungainly picture; but, although esteemed a man of honour, and evincing liberal and even benevolent tendencies, the Monarch displayed not only an unblushing and scandalous profligacy, but a love for coarse and unworthy society. His court is said to have been modelled upon that of Louis the Fifteenth; but it was modelled upon the grossest and lowest principles only, and had none of the elegance even of that wretched King's depraved circles; and public decency was as much outraged by the three yachts which were prepared to carry over King George's mistresses and their suite,[70] when he visited Hanover, as by the empire of Madame de Pompadour. It must, independent of every other consideration, have been galling to Englishmen to behold, seated on their throne, a German, fifty-four years of age, who from that very circumstance, was little likely ever to boast, like Queen Anne, "of an English heart." "A hard fate," observes a writer of great impartiality, "that the enthronement of a stranger should have been the only means to secure our liberties and laws!"[71]