At last his sun declined. The Duke became more and more engrossed in his ideas of upsetting the constitution by means of his army, and listened more to his general, Remchingen, than to Suess. He entered into a compact with the elector of Bavaria and with the Bishops of Würzburg and Bamberg to send him troops to assist him in his great project, and, as a price for this assistance, promised to introduce the Roman Catholic religion into Würtemberg.

The enemies of Suess, finding that he was losing hold of the Duke, took advantage of a precious stone which the Jew had sold him for a thousand pounds, and which proved to be worth only four hundred, to open the eyes of Charles Alexander to the character of the man who had exercised such unbounded influence over him. Suess, finding his power slipping from him, resolved to quit the country. The Duke stopped him. Suess offered five thousand pounds for permission to depart; it was refused. Charles Alexander was aware that Suess knew too many court secrets to be allowed to quit the country. Moreover, the necessities of the Duke made him feel that he might still need the ingenuity of Suess to help him to raise money. As a means of retaining him he granted him a so-called "absolutorium"—a rescript which made him responsible to no one for any of his actions in the past or in the future. Furnished with this document, the Jew consented to remain, and then the Duke required of him a loan of four thousand pounds for the expenses of a journey he meditated to Danzig to consult a physician about a foot from which he suffered. The "absolutorium" was signed in February 1737.

On March 12 following, Charles Alexander started on his journey from Stuttgart, but went no farther than his palace at Ludwigsburg.

Although the utmost secrecy had been maintained, it had nevertheless transpired that the constitution was to be upset as soon as the Duke had left the country. He had given sealed orders to his general, Remchingen, to this effect. The Bavarian and Würtemberg troops, to the number of 19,000 men, were already on the march. The Würtemberg army was entirely officered by the Duke's own men. Orders had been issued to forbid the Stuttgart Civil Guard from exercising and assembling, and ordering that a general disarmament of the Civil Guard and of the peasants and citizens should be enforced immediately the Duke had crossed the frontier. All the fortresses in the duchy had been provided with abundance of ammunition and ordnance.

At Ludwigsburg the Duke halted to consult an astrologer as to the prospect of his undertaking. Suess laughed contemptuously at the pretences of this man, and, pointing to a cannon, said to Charles Alexander, "This is your best telescope."

The sealed orders were to be opened on the 13th, and on that day the stroke was to be dealt. Already Ludwigsburg was full of Würzburg soldiers. A courier of the Duke with a letter had, in a drunken squabble, been deprived of the dispatch; this was opened and shown to the Assembly, which assembled in all haste and alarm. It revealed the plot. At once some of the notables hastened to Ludwigsburg to have an interview with their prince. He received them roughly, and dismissed them without disavowing his intentions. The consternation became general. The day was stormy; clouds were whirled across the sky, then came a drift of hail, then a gleam of sun. At Ludwigsburg, the wind blew in whole ranges of windows, shivering the glass. The alarm-bells rang in the church towers, for fire had broken out in the village of Eglosheim.

The Assembly sent another deputation to Ludwigsburg, consisting of their oldest and most respected members. They did not arrive till late, and unable to obtain access through the front gates, crept round by the kitchen entrance, and presented themselves unexpectedly before the Duke at ten o'clock at night, as he was retiring to rest from a ball that had been given. Dancing was still going on in one of the wings, and the strains of music entered the chamber when the old notables of Würtemberg, men of venerable age and high character, forced their way into the Duke's presence.

Charles Alexander had but just come away from the ball-room, seated himself in an arm-chair, and drunk a powerful medicine presented him by his chamberlain, Neuffer, in a silver bowl. Neuffer belonged to a family which had long been influential in Würtemberg, honourable and patriotic. Scarce had the Duke swallowed this draught when the deputation appeared. He became livid with fury, and though the interview took place with closed doors the servants without heard a violent altercation, and the Duke's voice raised as if he were vehemently excited. Presently the doors opened and the deputation came forth, greatly agitated, one of the old men in his hurry forgetting to take his cap away with him. Scarcely were they gone when Neuffer dismissed the servants, and himself went to a further wing of the palace.