They had happened, by a stroke of good luck, to hit upon the very highest point in the lip of the crater, and they were thus enabled to see, from the spot on which they stood, the entire extent of the island, to its uttermost limits; and they found it much bigger than they had anticipated.
In plan it bore a rough resemblance to a right-angled triangle, the body of which had been so twisted as to cause its apex to bear to the right. The base of this triangle, opposite to which the wreck of the brig could be seen as a tiny toy almost immediately beneath them, faced south-east, and appeared to measure between three and four miles across between its two extreme points, while the side corresponding to the perpendicular of the triangle was, according to Leslie’s estimate, nearly, if not quite, ten miles long. The crater was situated not in the centre of the island, but quite close to its south-eastern side, which accounted for the steepness of the acclivity that the explorers had been obliged to climb. Northward of the crater, after the first five hundred feet of steep decline that formed the summit proper, the ground, undulating picturesquely, fell away in quite a gentle slope to the most northerly extremity of the island, which Leslie judged to be a fairly bold headland. The barrier reef, upon which the brig lay stranded, was visible with startling distinctness throughout its entire length from this point; and Leslie observed that it formed a natural and most efficient breakwater to the lagoon that stretched along the entire south-east shore of the island, curving gradually round in a crescent form until it joined the island itself at its most westerly extremity, while away to the eastward there was a deep-water passage, between the reef and the island, of about an eighth of a mile in width.
Turning his attention once more to the island itself, Leslie observed that it was wooded to its uttermost extremity, and that no beach was to be discovered in any direction save that upon which they had landed, the ground appearing everywhere else to slope precipitously to the sea, in the form of bold cliffs. And, as savages would naturally build their villages close to a beach, to secure facilities for their fishing operations, Leslie was further confirmed in his hope that his island was uninhabited; especially as he looked carefully in every direction for the smoke of fires, and found none.
Then he allowed his eyes to wander farther afield, and intently scanned the entire visible surface of the ocean, in search of a sail, but without success. He was not surprised at this; for he knew the island to be situated far out of the track of all ships, save perhaps whalers, and craft that might be driven by adverse winds out of their proper course; and although it is the first instinct of the castaway sailor to maintain a ceaseless watch for a sail, the ex-lieutenant knew that the chance of rescue for himself and his companion by a passing ship was altogether too slight to be seriously given a place in his plans for the future. Nevertheless, for a moment he entertained the idea of erecting a flagstaff on the summit and hoisting a flag upon it for the purpose of attracting the attention of any ship that might perchance pass the place; but a very brief consideration of the project sufficed to convince him that the benefit to be derived therefrom was much too problematical to justify the expenditure of so much labour and time as it would involve. Moreover he had a conviction that any ship sighting so conspicuous an object as the island in a spot shown upon the charts as clear sea, would approach and give the place an overhaul.
But although Leslie’s most careful scrutiny failed to reveal any sign of the presence of ships, he was astonished to discover that there was other land in sight from his lofty lookout. He clearly saw two other eminences peering above the horizon to the westward, one bearing as nearly as possible due west, and the other about south-west, while away in the north-western quarter he believed he detected the loom of land at a very great distance. The two islands in clear view were apparently about the same distance away—a distance which, from their delicate, filmy appearance, he estimated to be quite a hundred miles; and he knew that they must be, like his own, mountainous, from the fact that they showed above the horizon.
The sun was by this time settling perceptibly in the western sky, and, lovely as was the prospect that stretched around them, Leslie felt that the time had arrived for them to be moving once more; they accordingly threw a final parting glance around them, and began the descent of the mountain. To ascend was one thing; to descend, quite another; and in a little more than an hour from the moment of leaving the summit they found themselves once more on the beach and beside their boat. Then, greatly fatigued by their unwonted exertions, but with the memory of a thoroughly enjoyable day fresh upon them, they paddled leisurely off to the brig, reaching her just as the sun was dipping below the horizon.
Their experiences of that day only whetted Leslie’s—and, it must be confessed, Flora’s—appetite for further exploration and adventure; the former in particular felt that he would never be satisfied until he had circumnavigated his island and critically examined every yard of its coast-line. To do this, a boat was of course necessary, or at least something of a much more seaworthy character than the “pontoon” in which he had adventured the passage to the island. And they had nothing of the kind. After Flora had retired to her cabin, however, Leslie spent an hour or so on deck, smoking his pipe and pondering upon the problem of how to supply the deficiency; and when at length he turned in, he believed he saw his way.
The following morning accordingly found him astir bright and early, eager to put his ideas into immediate execution. He first got on deck again the pontoon that he had used on the previous day, and proceeded to considerably strengthen her by the addition of further wales, stringers, and beams; and when he had got her to his liking, he proceeded to treat the other in a precisely similar fashion. Then he fitted them both with rudders. Next, having carefully disposed the two pontoons on deck, with their longitudinal centre-lines parallel and nine feet apart, he first decked them both completely in, leaving only a manhole eighteen inches square in the middle of each deck; and then proceeded to frame and fit together a thoroughly strong platform, twelve feet square, so arranged that it could be securely bolted to the gunwales of the two pontoons in the positions they occupied relatively to each other. This done, he launched the whole arrangement overboard; and found himself the proud and happy possessor of what, for want of a better and more appropriate name, he called a “catamaran;” the structure consisting, of course, of the two pontoons arranged parallel to each other, with a water space of six feet between them, and firmly and strongly connected with each other by the platform; the whole forming a very buoyant and commodious raft, capable of being rigged, and promising to behave exceedingly well under sail in smooth and even in moderately rough water. To rig this singular-looking craft with an enormous mainsail and jib was no very difficult matter, the wreckage alongside furnishing him with the requisite spars, canvas, and rigging. Each of the rudders was then furnished with a tiller; and these two tillers being connected together with a cross-piece, were controlled by a central tiller that actuated both rudders simultaneously. The construction and completion of this catamaran cost Leslie three whole weeks of arduous labour; but when she was finished he felt that the time had been well spent.
The next thing in order was to subject the craft to a sea-trial; and this Leslie at once proceeded to do. He left Flora on board the brig, with Sailor as her companion and protector, not caring to risk the girl’s safety on the catamaran until the reliability and sea-going qualities of the latter had been tested; but he promised her that he would not be absent more than two hours at the utmost, when, if everything proved satisfactory, he would return and take her for a cruise; and he suggested that she might devote the interval to the preparation of a luncheon-basket to serve them for the day. Then, hoisting his sails, he pushed off, and got the craft under way.
His first act, after getting away from the brig, was to test the behaviour of the catamaran under sail by putting her through a series of evolutions, such as tacking, jibing, and so on; and then, finding that she proved to be marvellously handy, he tested her speed off and on the wind. The trade wind happened to be piping up quite strong that day, and it was therefore a very favourable occasion upon which to subject the craft to such a test as Leslie desired; and he was not only delighted but astonished at the quite unexpected turn of speed that the craft developed, this being doubtless due to the enormous spread of canvas that her peculiar form of construction enabled her to carry. She skimmed down-wind with the speed of a swallow, and was scarcely less swift when close-hauled and looking up within four points of the wind.