They followed the waterline, moving swiftly through the tall grass on the bank. The rushing of the river would have masked their advance, but their footfalls made no sound. One moved with feline grace, the other with the deft stride of an experienced hunter. They signaled to one another each time they approached a clearing, expecting an ambush. Yet each time there was nothing but the sound of the river to meet them. "This is odd," the ranger finally said. "I have scouted this river many times before. The grinnin infested the entire area." "True enough," he replied. "Let us move onward."