the assistance of his confederate, with the intention, as soon as
circumstances would allow, of following with the main body. But the
movements of Wallenstein's army soon led him to suspect that he himself
was the object of attack; and the Duke's march through the Upper
Palatinate, placed the matter beyond a doubt. The question now was, how
to provide for his own security, and the prize was no longer his
supremacy, but his very existence. His fertile genius must now supply
the means, not of conquest, but of preservation. The approach of the
enemy had surprised him before he had time to concentrate his troops,
which were scattered all over Germany, or to summon his allies to his
aid. Too weak to meet the enemy in the field, he had no choice left,
but either to throw himself into Nuremberg, and run the risk of being
shut up in its walls, or to sacrifice that city, and await a
reinforcement under the cannon of Donauwerth. Indifferent to danger or
difficulty, while he obeyed the call of humanity or honour, he chose the
first without hesitation, firmly resolved to bury himself with his whole
army under the ruins of Nuremberg, rather than to purchase his own
safety by the sacrifice of his confederates.

Measures were immediately taken to surround the city and suburbs with
redoubts, and to form an entrenched camp. Several thousand workmen
immediately commenced this extensive work, and an heroic determination
to hazard life and property in the common cause, animated the
inhabitants of Nuremberg. A trench, eight feet deep and twelve broad,
surrounded the whole fortification; the lines were defended by redoubts
and batteries, the gates by half moons. The river Pegnitz, which flows
through Nuremberg, divided the whole camp into two semicircles, whose
communication was secured by several bridges. About three hundred
pieces of cannon defended the town-walls and the intrenchments. The
peasantry from the neighbouring villages, and the inhabitants of
Nuremberg, assisted the Swedish soldiers so zealously, that on the
seventh day the army was able to enter the camp, and, in a fortnight,
this great work was completed.

While these operations were carried on without the walls, the
magistrates of Nuremberg were busily occupied in filling the magazines
with provisions and ammunition for a long siege. Measures were taken,
at the same time, to secure the health of the inhabitants, which was
likely to be endangered by the conflux of so many p