He was aware, he said, of a conspiracy by which both his liberty and his life were endangered, and assured him that in immediate flight lay his only safety.
The Governor fled to Mechlin, where the same warnings were soon afterwards renewed, for the solemn sacrifice of Peter Panis, the poor preaching tailor of that city, had not been enough to strike terror to the hearts of all the Netherlanders.

One day, toward the end of June, the Duke of Aerschot, riding out with Don John, gave him a circumstantial account of plots, old and new, whose existence he had discovered or invented, and he showed a copy of a secret letter, written by the Prince of Orange to the estates, recommending the forcible seizure of his Highness.

It is true that the Duke was, at that period and for long after, upon terms of the most "fraternal friendship" with the Prince, and was in the habit of signing himself "his very affectionate brother and cordial friend to serve him," yet this did not prevent him from accomplishing what he deemed his duty, in secretly denouncing his plans, It is also true that he, at the same time, gave the Prince private information concerning the government, and sent him intercepted letters from his enemies, thus easing his conscience on both sides, and trimming his sails to every wind which might blow.

The Duke now, however, reminded his Highness of the contumely with which he had been treated at Brussels, of the insolent threats with which the citizens had pursued his servants and secretaries even to the very door of his palace.

He assured him that the same feeling existed at Mechlin, and that neither himself nor family were much safer there than in the capital, a plot being fully organized for securing his person.