Jack thought it might have been blown up by a volcano; and Peterkin said he thought it must have jumped up of its own accord! We also noticed, what had escaped us before, that the solid rocks of which the island was formed were quite different from the live coral rocks on the shore, where the wonderful little insects were continually working.

They seemed, indeed, to be of the sauce material,--a substance like limestone; but, while the coral rocks were quite full of minute cells in which the insects lived, the other rocks inland were hard and solid, without the appearance of cells at all.

Our thoughts and conversations on this subject were sometimes so profound that Peterkin said we should certainly get drowned in them at last, even although we were such good divers! Nevertheless we did not allow his pleasantry on this and similar points to deter us from making our notes and observations as we went along.
We found several more droves of hogs in the woods, but abstained from killing any of them, having more than sufficient for our present necessities.

We saw also many of their foot-prints in this neighbourhood.

Among these we also observed the footprints of a smaller animal, which we examined with much care, but could form no certain opinion as to them.