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next day we continued our explorations by land, and so for a week after that. I thought it best not to relinquish all authority, so I organised regular expeditions, and ordered their direction. The men did not object. It was all good enough fun to them.

The net results were that we found a nesting place of sea birds—too late in the season for eggs; a hot spring near enough camp to be useful; and that was about all. The sheep were the only animals on the island, although there were several sorts of birds. In general, the country was as I have described it—either volcanic or overlaid with fertile earth. In any case it was cañon and hill. We soon grew tired of climbing and turned our attention to the sea.

With the surf boat we skirted the coast. It was impregnable except in three places: our own beach, that near the seal rookery, and on the south side of the island. We landed at each one of these places. But returning close to the coast we happened upon a cave mouth more or less guarded by an outlying rock.

The day was calm, so we ventured in. At first I thought it merely a gorge in the rock, but even while peering for the end wall we slipped under the archway and found ourselves in a vast room.

Our eyes were dazzled so we could make out little