The dispositions to meet and overcome the difficulties imposed by the enemy's guns amounted, therefore, to concentrating upon them the batteries of the heavy ships, supporting each other, and at the same time covering the passage of a second column of gunboats, which was placed in the most favorable position for escaping injury. In principle the plan was the same as at New Orleans--the heavy ships fought while the light were to slip by; but in application, the circumstances at the lower forts would not allow one battery to be masked as at Port Hudson, because there were enemy's works on both sides. For meeting the difficulties of the navigation on this occasion, Farragut seems not to have been pleased with the arrangement adopted. "With the exception of the assistance they might have rendered the ships, if disabled, they were a great disadvantage," he wrote. The exception, however, is weighty; and, taken in connection with his subsequent use of the same order at Mobile, it may be presumed the sentence quoted was written under the momentary recollection of some inconvenience attending this passage. Certainly, with single-screw vessels, as were all his fleet, it was an inestimable advantage, in intricate navigation or in close quarters, to have the help of a second screw working in opposition to the first, to throw the ship round at a critical instant. In the supreme moment of his military life, at Mobile, he had reason to appreciate this advantage, which he there, as here, most intelligently used.