In addition to the vessels mentioned above there are others not described nor noticed in the text. The two battle-ships referred to upon page 55 are the _Sanspareil_ and the _Victoria_, the latter formerly known as the _Renown_, but named anew in April last. These ships are to carry 1180 tons of coal, and under forced draught are expected to develop 12,000 horse-power and a speed of 16.75 knots. The 9.2-inch 18-ton stern pivot gun originally intended for these vessels has been replaced by a 10-inch 26-ton rifle, and the secondary battery now includes twenty-one 6 and 3-pounder rapid fire guns. The other prominent departures from the central-citadel type are the _Nile_ and _Trafalgar_. These 11,940-ton ships are the largest war machines ever laid down for the British service. They are to carry revolving turrets on the fore and aft line amidships, and will have an intermediate broadside battery mounted in a superstructure which covers the full width of the ship between the turrets. A water-belt line 230 feet in length rises in the waist for a distance of 193 feet, and both belt and citadel are covered by a three-inch steel deck, which is curved forward and aft to strengthen the ram and protect the steering gear. The armor is compound—eighteen inches thick on the turret and twenty inches thick as a maximum on the water-line—and to support the backing there is an inner skin two inches thick. The armament consists of four 13½-inch 68-ton breech-loading rifles, two in each turret; of eight 5-inch guns in broadside on a covered deck protected by three inches of vertical armor, and of eight 6-pounder rapid fire, ten 3-pounder Maxim, and four Gardner guns. The horse-power under forced draft is to be 12,000, and the estimated speed is 16½ knots. The main battery originally designed for these ships included only one 68-ton breech-loading rifle for each turret; subsequently this plan was rejected, and the armament stated above was adopted. “The economy of mounting the heavy guns in pairs arises not only from the increased power thus obtained from a given weight of guns, but from the fact that it requires but little more armor to protect two guns than to protect one. It also requires more machinery to work two guns separately than in pairs, and the magazine and ammunition supply arrangements of guns mounted separately are necessarily more complicated, and require more men to operate them than those mounted in pairs.