I looked on the rapid currents which ran constantly on both sides of the island at a distance, and which were very terrible to me from the remembrance of the hazard I had been in before, and my heart began to fail me; for I foresaw that if I was driven into either of those currents, I should be carried a great way out to sea, and perhaps out of my reach or sight of the island again; and that then, as my boat was but small, if any little gale of wind should rise, I should be inevitably lost.
These thoughts so oppressed my mind that I began to give over my enterprise; and having hauled my boat into a little creek on the shore, I stepped out, and sat down upon a rising bit of ground, very pensive and anxious, between fear and desire, about my voyage; when, as I was musing, I could perceive that the tide was turned, and the flood come on; upon which my going was impracticable for so many hours.

Upon this, presently it occurred to me that I should go up to the highest piece of ground I could find, and observe, if I could, how the sets of the tide or currents lay when the flood came in, that I might judge whether, if I was driven one way out, I might not expect to be driven another way home, with the same rapidity of the currents.

This thought was no sooner in my head than I cast my eye upon a little hill which sufficiently overlooked the sea both ways, and from whence I had a clear view of the currents or sets of the tide, and which way I was to guide myself in my return.

Here I found, that as the current of ebb set out close by the south point of the island, so the current of the flood set in close by the shore of the north side; and that I had nothing to do but to keep to the north side of the island in my return, and I should do well enough.
Encouraged by this observation, I resolved the next morning to set out with the first of the tide; and reposing myself for the night in my canoe, under the watch-coat I mentioned, I launched out.

I first made a little out to sea, full north, till I began to feel the benefit of the current, which set eastward, and which carried me at a great rate; and yet did not so hurry me as the current on the south side had done before, so as to take from me all government of the boat; but having a strong steerage with my paddle, I went at a great rate directly for the wreck, and in less than two hours I came up to it.