This emphasized to the British the importance, which Nelson always so keenly felt, of meeting the enemy immediately after they left port.

Once away, and their destination in doubt, the chances in favor of any scheme were multiplied.

In their greatest and final effort, Cornwallis, off Brest, was fortunate, in that the plans of the Emperor first, and afterwards unusual weather conditions, retained the French fleet there in harbor; a result to which the material efficiency of his own ships, and their nearness to their base, much contributed.
Upon Nelson, with his crazy ships, on the other hand, fell the burden of counteracting a successful evasion of the Toulon fleet, of foiling, by sagacious and untiring pursuit, through immense and protracted discouragements, the efforts of the one division which had been committed to his watch.

Although it became much superior to his own force, he drove it out of the position in the West Indies first appointed for the meeting, followed it back to Europe, arrived before it, and then, finding it had gone to Ferrol, carried his squadron, without orders, counselled simply by his own genius, to the aid of Cornwallis; by which act the British navy, to the number of thirty-five ships-of-the-line, was massed in a central position, separating the two enemy's bodies, and able to act decisively against a foe approaching from either direction.

Thus a second time he prevented the enemy from forming a junction, unless they fought for it--an alternative Napoleon wished to avoid.