They first went to Sleswig on a visit to the Count de St. Germain, their great predecessor in the art of making dupes, and were received by him in the most magnificent manner. They no doubt fortified their minds for the career they had chosen, by the sage discourse of that worshipful gentleman; for immediately after they left him, they began their operations. They travelled for three or four years in Russia, Poland, and Germany, transmuting metals, telling fortunes, raising spirits, and selling the elixir vitae wherever they went; but there is no record of their doings from whence to draw a more particular detail. It was not until they made their appearance in England in 1776, that the names of the Count and Countess di Cagliostro began to acquire a European reputation. They arrived in London in the July of that year, possessed of property in plate, jewels, and specie to the amount of about three thousand pounds. They hired apartments in Whitcombe-street, and lived for some months quietly. In the same house there lodged a Portuguese woman named Blavary, who, being in necessitous circumstances, was engaged by the Count as interpreter. She was constantly admitted into his laboratory, where he spent much of his time in search of the philosopher's stone. She spread abroad the fame of her entertainer in return for his hospitality, and laboured hard to impress everybody with as full a belief in his extraordinary powers as she felt herself. But as a female interpreter of the rank and appearance of Madame Blavary did not exactly correspond with the Count's notions either of dignity or decorum, he hired a person named Vitellini, a teacher of languages, to act in that capacity. Vitellini was a desperate gambler; a man who had tried almost every resource to repair his ruined fortunes, including among the rest the search for the philosopher's stone. Immediately that he saw the Count's operations, he was convinced that the great secret was his, and that the golden gates of the palace of fortune were open to let him in. With still more enthusiasm than Madame Blavary, he held forth to his acquaintance, and in all public places, that the Count was an extraordinary man, a true adept, whose fortune was immense, and who could transmute into pure and solid gold, as much lead, iron, and copper as he pleased. The consequence was, that the house of Cagliostro was besieged by crowds of the idle, the credulous, and the avaricious, all eager to obtain a sight of the "philosopher," or to share in the boundless wealth which he could call into existence.

Unfortunately for Cagliostro, he had fallen into evil hands; instead of duping the people of England as he might have done, he became himself the victim of a gang of swindlers, who, with the fullest reliance on his occult powers, only sought to make money of him. Vitellini introduced to him a ruined gambler like himself, named Scot, whom he represented as a Scottish nobleman, attracted to London solely by his desire to see and converse with the extraordinary man whose fame had spread to the distant mountains of the north. Cagliostro received him with great kindness and cordiality; and "Lord" Scot thereupon introduced a woman named Fry, as Lady Scot, who was to act as chaperone to the Countess di Cagliostro, and make her acquainted with all the noble families of Britain. Thus things went swimmingly. "His lordship," whose effects had not arrived from Scotland, and who had no banker in London, borrowed two hundred pounds of the Count; they were lent without scruple, so flattered was Cagliostro by the attentions they paid him, the respect, nay, veneration they pretended to feel for him, and the complete deference with which they listened to every word that fell from his lips.

Superstitious, like all desperate gamesters, Scot had often tried magical and cabalistic numbers, in the hope of discovering lucky numbers in the lottery, or at the roulette tables. He had in his possession a cabalistic manuscript, containing various arithmetical combinations of the kind, which he submitted to Cagliostro, with an urgent request that he would select a number. Cagliostro took the manuscript and studied it; but, as he himself informs us, with no confidence in its truth. He however predicted twenty as the successful number for the 6th of November following. Scot ventured a small sum upon this number, out of the two hundred pounds he had borrowed, and won. Cagliostro, incited by this success, prognosticated number twenty-five for the next drawing. Scot tried again, and won a hundred guineas. The numbers fifty-five and fifty-seven were announced with equal success for the 18th of the same month, to the no small astonishment and delight of Cagliostro, who thereupon resolved to try fortune for himself, and not for others. To all the entreaties of Scot and his lady that he would predict more numbers for them, he turned a deaf ear, even while he still thought him a lord and a man of honour. But when he discovered that he was a mere swindler, and the pretended Lady Scot an artful woman of the town, he closed his door upon them and on all their gang.

Having complete faith in the supernatural powers of the Count, they were in the deepest distress at having lost his countenance. They tried by every means their ingenuity could suggest, to propitiate him again; they implored, they threatened, and endeavoured to bribe him. But all was vain. Cagliostro would neither see nor correspond with them. In the mean time they lived extravagantly; and in the hope of future, exhausted all their present gains. They were reduced to the last extremity, when Miss Fry obtained access to the Countess, and received a guinea from her on the representation that she was starving. Miss Fry, not contented with this, begged her to intercede with her husband, that for the last time he would point out a lucky number in the lottery. The Countess promised to exert her influence, and Cagliostro thus entreated, named the number eight, at the same time reiterating his determination to have no more to do with any of them. By an extraordinary hazard, which filled Cagliostro with surprise and pleasure, number eight was the greatest prize in the lottery. Miss Fry and her associates cleared fifteen hundred guineas by the adventure; and became more than ever convinced of the occult powers of Cagliostro, and strengthened in their determination never to quit him until they had made their fortunes. Out of the proceeds, Miss Fry bought a handsome necklace at a pawnbrokers for ninety guineas. She then ordered a richly chased gold box, having two compartments, to be made at a jeweller's, and putting the necklace in the one, filled the other with a fine aromatic snuff. She then sought another interview with Madame di Cagliostro, and urged her to accept the box as a small token of her esteem and gratitude, without mentioning the valuable necklace that was concealed in it. Madame di Cagliostro accepted the present, and was from that hour exposed to the most incessant persecution from all the confederates, Blavary, Vitellini, and the pretended Lord and Lady Scot. They flattered themselves they had regained their lost footing in the house, and came day after day to know lucky numbers in the lottery; sometimes forcing themselves up the stairs, and into the Count's laboratory, in spite of the efforts of the servants to prevent them. Cagliostro, exasperated at their pertinacity, threatened to call in the assistance of the magistrates; and taking Miss Fry by the shoulders, pushed her into the street.

From that time may be dated the misfortunes of Cagliostro. Miss Fry, at the instigation of her paramour, determined on vengeance. Her first act was to swear a debt of two hundred pounds against Cagliostro, and to cause him to be arrested for that sum. While he was in custody in a sponging house, Scot, accompanied by a low attorney, broke into his laboratory, and carried off a small box, containing, as they believed, the powder of transmutation, and a number of cabalistic manuscripts and treatises upon alchymy. They also brought an action against him for the recovery of the necklace; and Miss Fry accused both him and his Countess of sorcery and witchcraft, and of foretelling numbers in the lottery by the aid of the devil. This latter charge was actually heard before Mr. Justice Miller. The action of trover for the necklace was tried before the Lord Chief Justice of the Common Pleas, who recommended the parties to submit to arbitration. In the mean time Cagliostro remained in prison for several weeks, till having procured bail, he was liberated. He was soon after waited upon by an attorney named Reynolds, also deep in the plot, who offered to compromise all the actions upon certain conditions. Scot, who had accompanied him, concealed himself behind the door, and suddenly rushing out, presented a pistol at the heart of Cagliostro, swearing he would shoot him instantly, if he would not tell him truly the art of predicting lucky numbers, and of transmuting metals. Reynolds pretending to be very angry, disarmed his accomplice, and entreated the Count to satisfy them by fair means, and disclose his secrets, promising that if he would do so, they would discharge all the actions, and offer him no further molestation. Cagliostro replied, that threats and entreaties were alike useless; that he knew no secrets; and that the powder of transmutation of which they had robbed him, was of no value to anybody but himself. He offered, however, if they would discharge the actions, and return the powder and the manuscripts, he would forgive them all the money they had swindled him out of. These conditions were refused; and Scot and Reynolds departed, swearing vengeance against him.

Cagliostro appears to have been quite ignorant of the forms of law in England, and to have been without a friend to advise him as to the best course he should pursue. While he was conversing with his Countess on the difficulties that beset them, one of his bail called, and invited him to ride in a hackney coach to the house of a person who would see him righted. Cagliostro consented, and was driven to the King's Bench prison, where his friend left him. He did not discover for several hours that he was a prisoner, or in fact understand the process of being surrendered by one's bail.

He regained his liberty in a few weeks; and the arbitrators between him and Miss Fry, made their award against him. He was ordered to pay the two hundred pounds she had sworn against him, and to restore the necklace and gold box which had been presented to the Countess. Cagliostro was so disgusted, that he determined to quit England. His pretensions, besides, had been unmercifully exposed by a Frenchman, named Morande, the Editor of the Courier de l'Europe, published in London. To add to his distress, he was recognised in Westminster Hall, as Joseph Balsamo, the swindler of Palermo. Such a complication of disgrace was not to be borne. He and his Countess packed up their small effects, and left England with no more than fifty pounds, out of the three thousand they had brought with them.

They first proceeded to Brussels, where fortune was more auspicious. They sold considerable quantities of the elixir of life, performed many cures, and recruited their finances. They then took their course through Germany to Russia, and always with the same success. Gold flowed into their coffers faster than they could count it. They quite forgot all the woes they had endured in England, and learned to be more circumspect in the choice of their acquaintance.

In the year 1780, they made their appearance in Strasbourg. Their fame had reached that city before them. They took a magnificent hotel, and invited all the principal persons of the place to their table. Their wealth appeared to be boundless, and their hospitality equal to it. Both the Count and Countess acted as physicians, and gave money, advice, and medicine to all the necessitous and suffering of the town. Many of the cures they performed, astonished those regular practitioners who did not make sufficient allowance for the wonderful influence of imagination in certain cases. The Countess, who at this time was not more than five-and-twenty, and all radiant with grace, beauty, and cheerfulness, spoke openly of her eldest son as a fine young man of eight-and-twenty, who had been for some years a captain in the Dutch service. The trick succeeded to admiration. All the ugly old women in Strasbourg, and for miles around, thronged the saloon of the Countess to purchase the liquid which was to make them as blooming as their daughters; the young women came in equal abundance that they might preserve their charms, and when twice as old as Ninon de L'Enclos, be more captivating than she; while men were not wanting fools enough to imagine, that they might keep off the inevitable stroke of the grim foe, by a few drops of the same incomparable elixir. The Countess, sooth to say, looked like an incarnation of immortal loveliness, a very goddess of youth and beauty; and it is possible that the crowds of young men and old, who at all convenient seasons haunted the perfumed chambers of this enchantress, were attracted less by their belief in her occult powers than from admiration of her languishing bright eyes and sparkling conversation. But amid all the incense that was offered at her shrine, Madame di Cagliostro was ever faithful to her spouse. She encouraged hopes, it is true, but she never realised them; she excited admiration, yet kept it within bounds; and made men her slaves, without ever granting a favour of which the vainest might boast.

In this city they made the acquaintance of many eminent persons, and among others, of the Cardinal Prince de Rohan, who was destined afterwards to exercise so untoward an influence over their fate. The Cardinal, who seems to have had great faith in him as a philosopher, persuaded him to visit Paris in his company, which he did, but remained only thirteen days. He preferred the society of Strasbourg, and returned thither, with the intention of fixing his residence far from the capital. But he soon found that the first excitement of his arrival had passed away. People began to reason with themselves, and to be ashamed of their own admiration. The populace, among whom he had lavished his charity with a bountiful hand, accused him of being the Antichrist, the Wandering Jew, the man of fourteen hundred years of age, a demon in human shape, sent to lure the ignorant to their destruction; while the more opulent and better informed called him a spy in the pay of foreign governments, an agent of the police, a swindler, and a man of evil life. The outcry grew at last so strong, that he deemed it prudent to try his fortune elsewhere.