"I hope it won't be a case of the moths and the candle!" said Zaidie. "They don't seem to have taken much interest in us so far. Perhaps they haven't been able to see properly, but suppose they were attracted by the light and began crowding round us and fastening on to us, as the horrible things do with each other. What should we do then? They might drag us down and perhaps keep us there; but there's one thing, they'd never eat us, because we could keep closed up and die respectably together." "Not much fear of that, little woman," he said, "we're too strong for them. Hardened steel and toughened glass ought to be more than a match for a lot of exaggerated jelly-fish like these," said Redgrave, as he switched on the head searchlight. "We've come here to see strange things and we may as well see them. Ah, would you, my friend. No, this is not one of your sort, and it isn't meant to eat." An enormous double-headed monster, apparently some four hundred feet long, came floating towards them as the searchlight flashed out, and others began instantly to crowd about them, just as Zaidie had feared. "Lenox, for Heaven's sake be careful!" cried Zaidie, shrinking up beside him as the huge, hideous head, with its saucer eyes and enormous beak-like jaws wide open, came towards them. "And look! there are more coming. Can't we go up and get away from them?" "Wait a minute, little woman," replied Redgrave, who was beginning to feel the passion of adventure thrilling along his nerves. "If we fought the Martian air fleet and licked it I think we can manage these things. Let's see how he likes the light." As he spoke he flashed the full glare of the five thousand candle-power lamp full on to the creature's great cat-like eyes. Instantly it bent itself up into an arc. The two heads, each the exact image of the other, came together. The four eyes glared half-dazzled into the conning-tower, and the four fearful jaws snapped viciously together. "Lenox, Lenox, for goodness' sake let us go up!" cried Zaidie, shrinking still closer to him. "That thing's too horrible to look at." "It is a beast, isn't it?" he said; "but I think we can cut him in two without much trouble." He signalled for full speed. The _Astronef_ ought to have sprung forward and driven her ram through the huge, brick-red body of the hideous creature which was now only a couple of hundred yards from them; but instead of that a slow, jarring, grinding thrill seemed to run through her, and she stopped. The next moment Murgatroyd put his head up through the companion-way which led from the upper deck to the conning-tower, and said, in a tone whose calm indicated, as usual, resignation to the worst that could happen: