Strange peculiarity of the tides—Also of the twilight—Peterkin’s remarkable conduct in embracing a little pig and killing a big sow—Sage remarks on jesting—Also on love.  
It was quite a relief to us to breathe the pure air and to enjoy the glad sunshine after our long ramble in the Diamond Cave, as we named it; for although we did not stay more than half-an-hour away, it seemed to us much longer. While we were dressing, and during our walk home, we did our best to satisfy the curiosity of poor Peterkin, who seemed to regret, with lively sincerity, his inability to dive.
 
There was no help for it, however, so we condoled with him as we best could. Had there been any great rise or fall in the tide of these seas, we might perhaps have found it possible to take him down with us at low water; but as the tide never rose or fell more than eighteen inches or two feet, this was impossible.
 
This peculiarity of the tide—its slight rise and fall—had not attracted our observation till some time after our residence on the island. Neither had we observed another curious circumstance until we had been some time there. This was the fact that the tide rose and fell with constant regularity, instead of being affected by the changes of the moon as in our own country, and as it is in most other parts of the world—at least, in all those parts with which I am acquainted. Every day and every night, at twelve o’clock precisely, the tide is at the full; and at six o’clock, every morning and evening, it is ebb. I can speak with much confidence on this singular circumstance, as we took particular note of it, and never found it to alter. Of course I must admit we had to guess the hour of twelve midnight, and I think we could do this pretty correctly; but in regard to twelve noon we are quite positive, because we easily found the highest point that the sun reached in the sky by placing ourselves at a certain spot whence we observed the sharp summit of a cliff resting against the sky, just where the sun passed.
 
Jack and I were surprised that we had not noticed this the first few days of our residence here, and could only account for it by our being so much taken up with the more obvious wonders of our novel situation. I have since learned, however, that this want of observation is a sad and very common infirmity of human nature, there being hundreds of persons before whose eyes the most wonderful things are passing every day who nevertheless, are totally ignorant of them. I therefore have to record my sympathy with such persons, and to recommend to them a course of conduct which I have now for a long time myself adopted—namely, the habit of forcing my attention upon all things that go on around me, and of taking some degree of interest in them whether I feel it naturally or not. I suggest this the more earnestly, though humbly, because I have very frequently come to know that my indifference to a thing has generally been caused by my ignorance in regard to it.
 
We had much serious conversation on this subject of the tides; and Jack told us, in his own quiet, philosophical way, that these tides did great good to the world in many ways, particularly in the way of cleansing the shores of the land, and carrying off the filth that was constantly poured into the sea therefrom—which, Peterkin suggested, was remarkably tidy of it to do. Poor Peterkin could never let slip an opportunity to joke, however inopportune it might be, which at first we found rather a disagreeable propensity, as it often interrupted the flow of very agreeable conversation—and, indeed, I cannot too strongly record my disapprobation of this tendency in general; but we became so used to it at last that we found it no interruption whatever. Indeed, strange to say, we came to feel that it was a necessary part of our enjoyment (such is the force of habit), and found the sudden outbursts of mirth, resulting from his humorous disposition, quite natural and refreshing to us in the midst of our more serious conversations. But I must not misrepresent Peterkin. We often found, to our surprise, that he knew many things which we did not; and I also observed that those things which he learned from experience were never forgotten. From all these things I came at length to understand that things very opposite and dissimilar in themselves, when united, do make an agreeable whole; as, for example, we three on this our island, although most unlike in many things, when united, made a trio so harmonious that I question if there ever met before such an agreeable triumvirate. There was, indeed, no note of discord whatever in the symphony we played together on that sweet Coral Island; and I am now persuaded that this was owing to our having been all tuned to the same key—namely, that of love! Yes, we loved one another with much fervency while we lived on that island; and, for the matter of that, we love each other still.
 
And while I am on this subject, or rather the subject that just preceded it—namely, the tides—I may here remark on another curious natural phenomenon. We found that there was little or no twilight in this island. We had a distinct remembrance of the charming long twilight at home, which some people think the most delightful part of the day—though, for my part, I have always preferred sunrise; and when we first landed, we used to sit down on some rocky point or eminence, at the close of our day’s work, to enjoy the evening breeze, but no sooner had the sun sunk below the horizon than all became suddenly dark. This rendered it necessary that we should watch the sun when we happened to be out hunting; for to be suddenly left in the dark while in the woods was very perplexing, as, although the stars shone with great beauty and brilliancy, they could not pierce through the thick umbrageous boughs that interlaced above our heads.
 
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