"But there's no reason for sitting here in the dark," he continued, as he switched on the powerful daylight lamps which lighted the vessel with the nearest approach to sunlight possible to produce. As soon as the lights were on, Dorothy looked intently at the strange women. "Now we can see what color they really are," she explained to her lover in a low voice. "Why, they aren't so very different from what they were before, except that the colors are much softer and more pleasing. They really are beautiful, in spite of being green. Don't you think so, Dick?" "They're a handsome bunch, all right," he agreed, and they were. Their skins were a light, soft green, tanned to an olive shade by their many fervent suns. Their teeth were a brilliant and shining grass-green. Their eyes and their long, thick hair were a glossy black. The Kondalians looked at the Earthly visitors and at each other, and the women uttered exclamations of horror. "What a frightful light?" exclaimed Sitar. "Please shut it off. I would rather be in total darkness than look like this!" "What's the matter, Sitar?" asked the puzzled Dorothy as Seaton turned off the lights. "You look perfectly stunning in this light." "They see things differently than we do," explained Seaton. "Their optic nerves react differently than ours do. While we look all right to them, and they look all right to us, in both kinds of light, they look just as different to themselves under our daylight lamps as we do to ourselves in their green light. Is that explanation clear?" "It's clear enough as far as it goes, but what do they look like to themselves?" "That's too deep for me--I can't explain it, any better than you can. Take the Osnomian color 'mlap,' for instance. Can you describe it?" "It's a kind of greenish orange--but it seems as though it ought not to look like that color either." "That's it, exactly. From the knowledge you received from the educator, it should be a brilliant purple. That is due to the difference in the optic nerves, which explains why we see things so differently from the way the Osnomians do. Perhaps they can describe the way they look to each other in our white light." "Can you, Sitar?" asked Dorothy. "One word describes it--'horrible.'" replied the Kondalian princess, and her husband added: "The colors are distorted and unrecognizable, just as your colors are to your eyes in our light." "Well, now that the color question is answered, let's get going. I pretty nearly asked you the way, Dunark--forgot that I know it as well as you do." * * * * *