A lesson is never learnt till it is learnt over many times, and a spot is best understood by staying in it and mastering it.

In natural history the old scholar's saw of 'Cave hominem unius libri' may be paraphrased by 'He is a thoroughly good naturalist who knows one parish thoroughly.' So back to our little beach we went, and walked it all over again, finding, of course, many things which had escaped us the night before.

We saw our first Melocactus, and our first night-blowing Cereus creeping over the rocks.

We found our first tropic orchid, with white, lilac, and purple flowers on a stalk three feet high.

We saw our first wild pines (Tillandsias, etc.) clinging parasitic on the boughs of strange trees, or nestling among the angular limb- like shoots of the columnar Cereus.