It was not such an easy matter getting about; more difficult than I had imagined. I have said the stones were coated over with a slimy substance, and this made them slippery too. Had they been well soaped, they could not have been smoother to the tread; and before I had proceeded very far, I got a tolerably ugly fall, and several severe scrambles. I hesitated as to whether I should go farther in that direction, which was to the opposite side from where I had left the boat; but there was a sort of peninsula jutting out from the main part of the reef; and near the end of this I saw what I fancied to be a collection of rare shells, and I was now desirous of possessing some. With this view, then, I kept on. I had already observed several sorts of shells among the sand that lay between the boulders, some with fish in them, and others opened and bleached. None of these kinds were new to me, for I had seen them all many a time before--even in the potato-field, where they turned up among the wreck. They were only blue mussels, and a sort the farm people called "razors," and "whelks," and common "cockle-shells." I saw no oysters, and I regretted this, for I had grown hungry and could have eaten a dozen or two; but it was not the ground for these. Plenty of little crabs and lobsters there were, but these I did not fancy to eat unless I could have boiled them, and that of course was not possible under the circumstances. On my way to the front of the peninsula, I looked for "sea-urchin," but none fell in my way. I had often wished to get a good specimen of this curious shell, but without success. Some of them turned up now and then upon the beach near our village, but they were not allowed to lie long. As they made a pretty ornament for the mantel-shelf, and were rare upon our coast, it was natural they should be prized above the common kinds, and such was in reality the case. This reef being remote, and being seldom visited by any of the boatmen, I was in hopes I should find some upon it, and I was determined to look narrowly for one. With this view I sauntered slowly along, examining every crevice among the rocks, and every water hole that lay within eyeshot of my path.