He eagerly
offered, if he were accused or suspected of crime, to surrender himself
to imprisonment if he only could be brought to trial. Soon after Alva's
arrival in the Netherlands, the first part of this offer was accepted. No
sooner were the arrests of Egmont and Horn known in Madrid, than Montigny
was deprived of his liberty, and closely confined in the alcazar of
Segovia. Here he remained imprisoned for eight or nine months in a high
tower, with no attendant save a young page, Arthur de Munter, who had
accompanied him from the Netherlands. Eight men-at-arms were expressly
employed to watch over him and to prevent his escape.

One day towards the middle of July, 1568, a band of pilgrims, some of
them in Flemish attire, went through the streets of Segovia. They were
chanting, as was customary on such occasions, a low, monotonous song, in
which Montigny, who happened to be listening, suddenly recognized the
language of his fatherland. His surprise was still greater when, upon
paying closer attention, he distinguished the terrible meaning of the
song. The pretended pilgrims, having no other means of communication with
the prisoner, were singing for his information the tragic fates of his
brother, Count Horn, and of his friend, Count Egmont. Mingled with the
strain were warnings of his own approaching doom; if he were not able to
effect his escape before it should be too late. Thus by this friendly
masquerade did Montigny learn the fate of his brother, which otherwise,
in that land of terrible secrecy, might have been concealed from him for
ever.

The hint as to his own preservation was not lost upon him; and he at once
set about a plan of escape. He succeeded in gaining over to his interests
one of the eight soldiers by whom he was guarded, and he was thus enabled
to communicate with many of his own adherents without the prison walls.
His major-domo had previously been permitted to furnish his master's
table with provisions dressed by his own cook. A correspondence was now
carried on by means of letters concealed within the loaves of bread sent
daily to the prisoner. In the same way files were provided for sawing
through his window-bars. A very delicate ladder of ropes, by which he was
to effect his escape into the court below, was also transmitted. The plan
had been completely arranged. A certain Pole employed in the enterprise
was to be at Hernani, with horses in readiness to convey them to San
Sebastian. There a sl