The wild schemes and daring ambition of Wallenstein now made him indulge in the hope of dismembering the great conquests of the Empire, and seating himself upon a new throne, to be erected by the sword in northern Europe. This hope was crushed in 1634, when the great duke was spending the holidays of Christmas in the old castle of Egra in Bohemia. The garrison in this fortress was commanded by John Gordon, a Presbyterian, a native of Aberdeenshire, who was colonel of Tzertzski's regiment, and had once been a private soldier. Wallenstein's personal escort consisted of 250 men of James Butler's Irish regiment, commanded by that officer in person. James Butler (without communicating the matter to his brother Walter), John Gordon, and Major Walter Lesley, son of the Laird of Balquhan in the Garioch, on receiving private instructions from Vienna, resolved, without scruple or remorse, on removing the ambitious general from the path of the emperor for ever. Butler prepared a grand banquet, to which he invited the generalissimo's attendants. Previous to the latter, Butler, who, felt some distrust of Lesley and Gordon, who were both Scots and Presbyterians, while he was a Catholic, made some remarks expressive of admiration for the duke. "You may do as you please, gentlemen, in the matter at issue," said Gordon; "but death itself shall never alienate me from the duty and affection I bear his majesty the emperor." Thus encouraged, Butler produced a letter from Mathias Count Galas (who, after the siege of Mantua, obtained the supreme command of the Imperial army), wherein Ferdinand II. authorized them and all his officers to withdraw "their allegiance" from Wallenstein, for all the troops had taken an oath of obedience to _him_ by the emperor's express order. Fully empowered by this document to do what they pleased, the three mercenaries resolved on his immediate destruction. One proposed to poison him; another suggested that he should be sent a prisoner to Vienna; a third, that he should be slain after _disposing_ of his friends at the _banquet_. The last was at once adopted, and several were invited, among whom were Wallenstein's brother-in-law, Colonel Tzertzski; Colonels Illo, William Kinski, and the secretary, Colonel Niemann. The castle was filled with soldiers on whom Gordon and Butler could rely. As the fatal evening drew on, Captain Walter Devereaux, Watchmaster Robert Geraldine, and fifteen other Irishmen, entered the keep, and took possession of a postern; while to Captain Edmund Bourke, with one hundred more, was assigned the duty of keeping the streets quiet; for Tzertzski's dragoons occupied the town, which is the capital of its circle, and was then surrounded by a triple rampart, washed on one side by the Egra.