The first half mile into the swamp hadn't been so bad, but now Mallard began to feel really afraid. There were things in here that no spaceman had ever seen and against some of them the small blaster on his hip would be about as effective as a popgun. A little way ahead of him, he could dimly see the naked body of the Mercurian swamp girl and he swore enviously at the way she slipped through the dense fern growth, her webbed feet gripping the mud firmly. Once she held up her hand warningly and h