"Much, and in many ways, my Eveena. You will soon learn to understand what I wish to examine and the use of the instruments I employ; and then you will be the most useful of assistants, as you are the best and most welcome of companions." As I spoke a soft colour suffused her face, and her eyes brightened with a joy and contentment such as no promise of pleasure or indulgence could have inspired. To be the partner of adventure and hardship, the drudge in toil and sentinel in peril, was the boon she claimed, the best guerdon I could promise. If but the promise might have been better fulfilled! It was not till in latitude 9° S. we emerged into the open ocean, and presently found ourselves free from the currents of the narrow waters, that, in order to see the remarkable island of which I had caught sight in my descent, I requested Ergimo to remain for some hours above the surface. The island rises directly out of the sea, and is absolutely unascendible. Balloons, however, render access possible, both to its summit and to its cave-pierced sides. It is the home of enormous flocks of white birds, which resemble in form the heron rather than the eider duck, but which, like the latter, line with down drawn from their own breasts the nests which, counted by millions, occupy every nook and cranny of the crystalline walls, about ten miles in circumference. Each of the nests is nearly as large as that of the stork. They are made of a jelly digested from the bones of the fish upon which the birds prey, and are almost as white in colour as the birds themselves. Freshly formed nest dissolved in hot water makes dishes as much to the taste of Martialists as the famous bird-nest soup to that of the Chinese. Both down and nests, therefore, are largely plundered; but the birds are never injured, and care is taken in robbing them to leave enough of the outer portion of the nest to constitute a bed for the eggs, and encourage the creatures to rebuild and reline it. One harvest only is permitted, the second stripping of feathers and the rebuilt nest being left undisturbed. The caverns are lined with a white guano, now some feet thick, since it has ceased to be sought for manure; the Martialists having discovered means of saturating the soil with ammonia procured from the nitrogen of the atmosphere, which with the sewage and other similar materials enables them to dispense with this valuable bird manure. Whether the white colour of the island, perceptible even in a large Terrestrial telescope, is in any degree due to the whiteness of the birds, their nests, and leavings, or wholly to reflection from the bright spar-like surface of the rock itself, and especially of the flat table-like summit, I will not pretend to say.