This is a stroke of genius. And to carry it out is needed the miracle of the two foremost powers in the world—love and fear.
Of the most vivid fear; of that which freezes your blood: if, peering through a hole in a tree, the black flat head of a cold reptile rises and hisses in your face, though you are a man, and a brave man, you tremble.
How much more must the little, feeble, disarmed creature, surprised in its nest, and unable to make use of its wings—how much more must it tremble, and sink panic-stricken!
The invention of the aerial city took place in the land of serpents.
Africa, the realm of monsters, in its horrible arid wastes, sees them cover the earth. Asia, on the burning shore of Bombay, in her forests where the mud ferments, makes them swarm, and fatten, and swell with venom. In the Moluccas they are innumerable.
Thence came the inspiration of the Loxia pensilis (the grosbeak of the Philippines). Such is the name of the great artist.
He chooses a bamboo growing close to the water. To the branches of this tree he delicately suspends some vegetable fibres. He knows beforehand the weight of the nest, and never errs. To the threads he attaches, one by one (not supporting himself on anything, but working in the air) some sufficiently strong grasses. The task is long and fatiguing; it presupposes an infinite amount of patient courage.
The vestibule alone is nothing less than a cylinder of twelve to fifteen feet, which hangs over the water, the opening being below, so that one enters it ascending. The upper extremity may be compared to a gourd or an inflated bag, like a chemist's retort. Sometimes five or six hundred nests of this kind hang to a single tree.
Such is my city of the air; not a dream and a phantasy, like that of Aristophanes, but actual, realized, and answering the three conditions: security both on the side of land and water, and inaccessibility to the robbers of the air through its narrow openings, where one can only enter by ascending with great difficulty.