The causeway was high and dry above the sea, and long and narrow in its course, and irregular and rugged in its aspect.
Walking on it would have been very dangerous, either to a reckless or a timid pedestrian.
But Justin was at the same time careful and fearless, and he and his little companion went on safely enough, though often slowly and with difficulty; for often a deep chasm cut the causeway across, and then Justin would be obliged to stop and consider the best way of getting over it, and then, with the aid of his walking-stick, he would have to descend very carefully down one side, and using his stick for a leaping pole, throw himself across the isthmus at the bottom, and then as carefully ascend the other side.
Sometimes the little dog would follow him well enough, tripping down the first side, swimming the isthmus at the bottom, and climbing up the other side; but at other times when the sides were very steep or the stream at the bottom very rapid, the little dog would come to a dead halt, and stand whining miserably, and Justin would have to turn back, and take him up in his arms, and carry him over.
Thus Justin was two hours in going the distance between the ship and the shore.
As he neared the shore, the causeway became wider and higher, until it began to assume the aspect of a cape or promontory, and so it continued to rise and widen until, almost unawares, Justin, with his dog, found himself ascending a rocky hill, in character almost a barren mountain.
In this ascent he found his walking-stick of great service in getting a purchase upon the difficult ground; but he found his little dog a great trouble to him; for he—the dog—was tired, and would often stop and whine as persistently to be taken up and carried as any spoiled child.
And Justin always indulged him, for he was much too kind-hearted to leave his little four-footed companion behind. Another hour’s painful toil brought Justin to the top of the mountain, which he judged to be about a thousand feet above the level of the sea. The summit was as bare of vegetation as the ascent from the causeway had been; so that Justin, from his point of observation, had a very extended view of the landscape. He took out his telescope, adjusted it, and took a sweeping view around the horizon.
He found that the land was on all sides surrounded by the sea, and that he was on an island oblong in shape, and as well as he could judge, about twenty miles in length by about ten in its utmost width.
The lofty hill, or mountain, upon which he stood, was the highest point upon the island, and was situated near the southern end—the long causeway upon which the ship had been wrecked being the extreme southern point. And, though this mountain was barren on the side descending towards the interior, it was fringed with beautiful trees and gemmed with sparkling fountains. The center of the island was very luxuriant in tropical vegetation. Towards the extreme north the land descended and narrowed to a sandy neck of not more than a mile in width from sea to sea; but this neck was thickly wooded with the tall and graceful cocoa palms.