here recalled, "The best protection against the enemy's fire is a well-directed fire from our own guns." The disposition adopted for the squadron was chiefly a development of this simple principle, combined with an attempt to form the ships in such an order as should offer the least favorable target to the enemy. A double column of ships, if it presents to the enemy a battery formidable enough to subdue his fire, in whole or in part, shows a smaller target than the same number disposed in a single column; because the latter order will be twice as long in passing, with no greater display of gun-power at a particular point. The closer the two columns are together, the less chance there is that a shot flying over the nearer ship will strike one abreast her; therefore, when the two are lashed side by side this risk is least, and at the same time the near ship protects the off one from the projectile that strikes herself. These remarks would apply, in degree, if all the ships of the squadron had had powerful batteries; the limitation being only that enough guns must be in the near or fighting column to support each other, and to prevent several of the enemy's batteries being concentrated on a single ship--a contingency dependent upon the length of the line of hostile guns to be passed. But when, as at Port Hudson, several of the vessels are of feeble gun-power, so that their presence in the fighting column would not re-enforce its fire to an extent at all proportionate to the risk to themselves, the arrangement there adopted is doubly efficacious.