passage, and the damage which must be inflicted in running the gauntlet of so formidable a chain of forts, for the mere sake of scrambling up to Spithead by the Solent, only to find himself, when there, involved in the same kind of difficulties from the cross-fire of sea and land forts, which are next to be described.
Before, however, proceeding to consider the nature of the sea defences at and around Spithead, it will be necessary first of all to take a glance at the map of the sea’s bottom, between the mainland and the Wight. The Spit Sand has already been described. Its outlines, as well as those of the other shoals about to be mentioned, are denoted in our engraving by dotted lines. To the eastward of the Spit, there stretches down southward, to a distance of three miles from Southsea Castle, another large shoal called the Horse Sand, with a pendant going off S.E., called the Horse Tail; and though vessels of light draught can—especially at high water—pass across the sand, yet the regular channel, and the only one for all large ships, lies south of the sand, and of the five black buoys which mark the edge of the shoal. This gets rid at once for all purposes of practical navigation of some three good miles of the space in question—but this is not all. From the opposite shore of the Isle of Wight, a little east of Ryde, a third shoal, called No Man’s Land, protrudes itself nearly two miles from shore in a north-easterly direction towards the Horse, its limit marked by a white buoy, distant a little over a mile from the westernmost of the five which mark the Horse, &c.
Through the channel between these five black buoys and one white, every ship of any size must pass, in order to get to Spithead or Portsmouth, and when in the centre of its narrowest part would find the head of the Horse Sand about half-a-mile on its right, No Man’s Land about the same distance to the left, and the head of the Spit two miles in front. It should be added, that about three miles further westward, and in mid-channel between Ryde and Gillkicker Point (H), lies another shoal, called Sturbridge.
The scheme of defence now being put in force involves the erection on No Man’s Land, the Horse Sand, and Sturbridge, of three large forts; and on the Spit Sand and on the Horse, halfway between the large work and the mainland, of two smaller forts, whilst on shore a string of forts, called Cumberland (N), Eastney (O), and Lump’s Forts (P), and Southsea Castle (Q), combine with Point Battery (E), and the southern face of Portsmouth Lines in guarding the eastern approaches to the harbour, the protection of the western being provided for by Block House Fort (F), Fort Monkton (G), and batteries on Gillkicker Point (H), connected by works with the chain of forts west of Gosport, already described. Let us next proceed to consider what obstacles an attack by sea, from the most likely quarter, S.E., would have to encounter, from this system of defences. We will, as in the case of the Thames and Sheerness, imagine ourselves on board one of the attacking squadron. Our course lies past the Warner Light, shown in the right-hand lower corner of the engraving, our guiding marks being the odd-looking sea mark called the Kickergill, seen on shore abreast of the middle of Stokes Bay (I), as observed over Monkton Fort and the works hard by (H). Without taking much notice of the fact, that before we arrived at the Warner, we should have exposed ourselves to the fire of both Nettlestone Battery (Y), and another a mile to the southward, at St. Helen’s Point, but at a two mile range, we should, very soon after passing the Light ship, find ourselves in a position of which the diagram will give the best idea, whilst it at the same time will serve to elucidate the system of cross firing already treated of..png)
On our right we should find the Horse Sand Fort, opening on us from two of its flanks at once—we are assuming that the number of guns to be mounted on each of the three batteries we are now considering, will be, as set down in the Commissioners’ Report, 120—and we are assuming that Captain Sullivan’s plan will be adhered to in principle, and that these guns will consequently be mounted in casemated batteries of three tiers with [guns and] mortars on the roof, and we are further assuming that the gallant captain’s suggestion will be also attended to in determining the shape of the forts, and that they will be polygonal. From the Commissioners’ plan we gather that they will be heptagonal: this will give us about 17 guns to each face. Now, as this construction will always enable two faces at least at a time to bear on any one object, it follows that the Horse Sand Battery will open on us with the fire of no less than four-and-thirty guns of heavy calibre, whilst at the same moment the No Man’s Land Fort (U) would pour in a similar fire on our left, and, as we proceeded, the Spit Fort (T) would meet us with a raking fire of the same number of guns—nor would our pushing on briskly with all aid of sails, steam, and tide, avail us much, for as we close one face of the forts we merely open a fresh one, whilst the mortars from the roof would all the while be shelling us with a murderous vertical fire, the most dangerous of all