in the early days , it was she who had introduced him to the land and made him aware of it ; it was undina who had taken fynals by the pathways and taught him their secrets , immersed him in the waters under the bright sun and taught him to swim , she who had taken him rock-climbing , hiking up to their favorite spot on the weather-beaten top of the neighboring hills to the east , where the vaporous mists drifted low across the distant peaks , and fishing in the small mountain rivers and in lake firien itself .