There now remained, not the stirring employment of accompanying and supporting a victorious advance, but only the subordinate, though most essential, duty of impeding the communications of the enemy, upon which to a great extent must depend the issues on unseen and distant fields of war.  To this Nelson’s attention had already been turned, as one of the most important functions intrusted to him, even were the allies successful, and its difficulties had been impressed upon him by the experience of the previous year.  But since then the conditions had become far more onerous.  The defeat of the Austrians not only left Vado Bay definitively in the power of the French, but enabled the latter to push their control up to the very walls of Genoa, where they shortly established a battery and depot on the shore, at St. Pierre d’ Arena, within three hundred yards of the mole.  Thus the whole western Riviera, from the French border, was in possession of the enemy, who had also throughout the previous year so multiplied and strengthened the local defences, that, to use Nelson’s own words, “they have batteries from one end of the coast to the other, within shot of each other.”  Such were the means, also, by which Napoleon, the true originator of this scheme for securing these communications, insured the concentration of the flotilla at Boulogne, eight or ten years later, without serious molestation from the British Navy.

It may not unnaturally cause some surprise that, with the urgent need Nelson had felt the year before for small armed vessels, to control the coastwise movements of the enemy, upon which so much then depended, no serious effort had been made to attach a flotilla of that kind to the fleet.  The reply, however, to this very obvious criticism is, that the British could not supply the crews for them without crippling the efficiency of the cruising fleet; and it was justly felt then, as it was some years later at the time of the Boulogne flotilla, that the prime duty of Great Britain was to secure the sea against the heavy fleets of the enemy.  If, indeed, the Italian States, whose immediate interests were at stake, had supplied seamen, as they might have done, these could quickly have been formed to the comparatively easy standard of discipline and training needed for such guerilla warfare, and, supported by the cruising fleet, might have rendered invaluable service, so long as the system of coast defence was defective.  How far the rulers of those States, trained heretofore to the narrowest considerations of personal policy, could have been induced to extend this assistance, is doubtful.  They did nothing, or little.