An undersized, lean, wizen-faced man, with an immense bald head, as round and smooth and shining as a giant soap-bubble, and a pair of beady black eyes, set close together, so that he resembled a gnome of amazing brain capacity and prodigious power of concentration, sat bent over a writing desk with a huge sheet of cardboard before him, on which he was swiftly drawing geometrical and trigonometrical figures. Compasses, T-squares, rulers, protractors, and ellipsographs obeyed the touch of his fingers as if inspired with life. The room around him was a jungle of terrestrial and celestial globes, chemists' retorts, tubes, pipes, and all the indescribable apparatus that modern science has invented, and which, to the uninitiated, seems as incomprehensible as the ancient paraphernalia of alchemists and astrologers. The walls were lined with book shelves, and adorned along the upper portions with the most extraordinary photographs and drawings. Even the ceiling was covered with charts, some representing the sky, while many others were geological and topographical pictures of the face of the earth.