Still I am constrained to confess that hitherto we have been wonderfully favoured, and that for some reason unknown to myself we have accomplished our journey under singularly favourable conditions of temperature. But it seems manifest to me that some day we shall reach a region where the central heat attains its highest limits, and goes beyond a point that can be registered by our thermometers.

“That is what we shall see.” So says the Professor, who, having named this volcanic islet after his nephew, gives the signal to embark again.