and
all being bound together, stem, stern, and midships, by quadruple hawsers
and chains. Each boat was anchored at stem and stern with loose cables.
Strong timbers, with cross rafters, were placed upon the boats, upon
which heavy frame-work the planked pathway was laid down. A thick parapet
of closely-fitting beams was erected along both the outer edges of the
whole fabric. Thus a continuous and well-fortified bridge, two thousand
four hundred feet in length, was stretched at last from shore to shore.
Each of the thirty-two boats on which the central portion of the
structure reposed, was a small fortress provided with two heavy pieces of
artillery, pointing, the one up, the other down the stream, and manned by
thirty-two soldiers and four sailors, defended by a breastwork formed of
gabions of great thickness.

The forts of Saint Philip and St. Mary, at either end of the bridge, had
each ten great guns, and both were filled with soldiers. In front of each
fort, moreover, was stationed a fleet of twenty armed vessels, carrying
heavy pieces of artillery; ten anchored at the angle towards Antwerp, and
as many looking down the river. One hundred and seventy great guns,
including the armaments of the boats under the bridge of the armada and
the forts, protected the whole structure, pointing up and down the
stream.

But, besides these batteries, an additional precaution had been taken. On
each side, above and below the bridge, at a moderate distance--a bow
shot--was anchored a heavy, raft floating upon empty barrels. Each raft
was composed of heavy timbers, bound together in bunches of three, the
spaces between being connected by ships' masts and lighter spar-work, and
with a tooth-like projection along the whole outer edge, formed of strong
rafters, pointed and armed with sharp prongs and hooks of iron. Thus a
serried phalanx, as it were, of spears stood ever on guard to protect the
precious inner structure. Vessels coming from Zeeland or Antwerp, and the
floating ice-masses, which were almost as formidable, were obliged to
make their first attack upon these dangerous outer defences. Each raft;
floating in the middle of the stream, extended twelve hundred, and
fifty-two feet across, thus protecting the whole of the bridge of boats
and a portion of that resting upon piles.

Such was the famous bridge of Parma. The magnificent undertaking has been
advantageously compared with the celebrated Rhine-bridge of Julius
Caesar. Wh