It was resolved to turn the whole force available in the island into the storm-cone, and especially into that part of it which could shoot masses and streamers of electric energy out to great distances in the atmosphere. Other indications of an approaching tornado soon appeared. The great telescope discovered a vast cloud of birds on the horizon, and the sea greatly agitated by shoals of fish beneath them. The vamolan analysed the sounds made by the birds and revealed that they were not all of one species; sea birds small and great were predominant; but there was no lack of land birds, insect-eaters chiefly, and a few great flesh-eaters, vultures, hawks, and falcons. The Lilamo knew in a moment what this meant. Myriads of microbes were afloat in the air in front of the storm, and the sky in the van of the cloud of birds was obscured by the mass of insect life battening on the unseen plague. The fish had gathered to eat the clotted life that dropped into the ocean, and the sea birds had assembled in pursuit of the fish. It was a striking sight, this great moving internecine slaughter and feast. Seated at a clevamolan, or combination of telescope and makrakoust, we were present at the scene, though hundreds of miles off. We could see the swoop of the vultures down on the land birds, too busy with their banquet of insects to foresee their own fate, the water boiling with the leap of the fish and the dive of the sea birds, and the air turbid with the flash and glimmer of wings; at the same time we could hear the war of jubilance and dismay, the wild cry of foretasting appetite, and the still wilder death-shriek; and round and through the clangour like an atmosphere moved the dull hum of happy glutted insect life. It sickened us and we had to cover our eyes and ears to shut out the carnage. We had forgotten that we had been using the clevamolan, and were glad to find that we could leave it and return to the ordinary powers of our senses; there was a speck on the horizon, which might be a boat at sea for anything our eyes could make out; whilst to our hearing there was the profoundest calm. Everything was ready for the concentration of our millions of horse-power in the direction of the north-east, when a new but by no means unexpected phase of the phenomenon occurred. Word came up from the north-east shore that a plague had broken out amongst the dwellers in the district, and that the medical wise men had been summoned to their help. The Lilamo had already given warning that something of this kind might be expected in that quarter, and the physicians were by this time removing all the Limanorans in the north-east to Oomalefa. So dense a cloud of insects was not there without the attraction of superfluous bacterial life. Not always was a tornado thus heralded and vanguarded by a winged army, but when it was, it meant the migration under magnetic impulse of clirolanic plague-swarms from some favourite breeding area.