marched from Flanders and, September 11, encamped at the village of
Harmignies, a short distance from Mons. In the night six hundred
Spaniards, each of whom to prevent mistakes wore a white shirt over his
armour, surprised the camp. The prince himself was awakened by a little
dog that slept in his tent and only narrowly escaped with his life,
several hundred of his troops being slain by the _Camisaders_. He was
now thoroughly discouraged and on the following day retreated first to
Mechlin, then to Roeremonde, where on September 30 the ill-fated
expedition was disbanded. The retirement from Harmignies decided the
fate of Mons. Favourable conditions were granted and Lewis of Nassau,
who was ill with fever, met with chivalrous treatment and was allowed to
return to Dillenburg.

William now found himself faced with something like financial ruin.
Mercenary armies are very costly, and by bitter experience he had learnt
the futility of opposing a half-hearted and badly disciplined force to
the veteran troops of Alva. He resolved therefore to go in person to
Holland to organise and direct the strong movement of revolt, which had
found expression in the meeting of the Estates at Dordrecht. His agents
had long been busy going about from town to town collecting funds in the
name of the prince and encouraging the people in their resistance to the
Inquisition and to foreign tyranny. William's declaration that
henceforth he intended to live and die in their midst and to devote
himself with all his powers to the defence of the rights and liberties
of the land met with willing and vigorous support throughout the greater
part of Holland, West Friesland and Zeeland; and contributions for the
supply of the necessary ways and means began to flow in. It was,
however, a desperate struggle to which he had pledged himself, and to
which he was to consecrate without flinching the rest of his life. If,
however, the prince's resolve was firm, no less so was that of Alva.