On his part, Charles was wholly unconscious of the extent of his loss of prestige within the French realm in 1472. There had been other periods when the king had appeared triumphant over his aspiring nobles only to be again checked by their alliance. In the radical change undergone by the feudatories after Guienne’s death and Brittany’s reconciliation, there was, however, no opening left for the Duke of Burgundy’s re-entry as a French political leader. It was this definitive cessation of his importance that Charles failed to recognise. Confident that his star was rising in the east he did not note the significance of its setting in the west. Thereupon the situation was,—Charles, believing that his plans were his own secret, versus Louis, fully advised of those plans and alert to all incidents of the past, present, and future in a fashion impossible to the duke in his absorbed contemplation of his own prospects, blocking the scope of his view.
With the emperor’s congratulations at the duke’s accession to Guelders, and his offers to invest him with the title, were coupled intimations that it was an opportune moment to resume consideration of an alliance between the Archduke Maximilian and Mary of Burgundy. The duke accepted the new overtures, and Rudolf de Soulz and Peter von Hagenbach proceeded to the Burgundian and Austrian courts respectively, as confidential envoys to discuss the marriage.[10]
Charles was far more gracious to De Soulz than he had been to the last imperial messenger, the Abbe de Casanova, who had restricted his proposals to Mary’s fortunes and ignored her father’s. The duke had no intention of permitting any conference to proceed on that line. He was explicit as to his requisitions. De Soulz was surprised by a gift of ten thousand florins, explained by the phrase, “because Monseigneur recognised the love and affection borne him by the said count.” That was a simple retainer. Other benefits, offices, and estates were conferred, to take effect on the day when Monseigneur was named King of the Romans.
The instructions to Hagenbach were definite, covering the ground of those previously mentioned, issued in 1470. He was, however, especially enjoined to assure Frederic that the duke did not require his abdication. He would be content to step into the shoes naturally vacated by his death.
The final suggestion resulting from these parleyings was that an interview between the two principals would be far more satisfactory than any further interchange of messages. It was not only a propitious time for a conference, but it was necessary. The ceremony of investiture of the duke into his latest acquired fief made it evidently imperative that he should visit the emperor. And to preparations for that event, Charles turned his attention, now absolutely confident that the outcome must be to his satisfaction. He had as little comprehension of the character of the man with whom he was to deal as he had of Louis XI. The choice of a place caused some difficulty, each prince preferring a locality near his own frontier. Metz was selected and abandoned on account of an epidemic. Finally Treves was appointed for the important occasion, and Frederic sent official invitations to the princes of the empire to follow him thither in October.