and the wise have said that it was by reason of the power of that holy jewel that they came in time to waters that no vessels save those of the teleri had known ; and they came to the enchanted isles and escaped their enchantment ; and they came into the shadowy seas and passed their shadows , and they looked upon tol eressea the lonely isle , but tarried not ; and at the last they cast anchor in the bay of eldamar , and the teleri saw the coming of that ship out of the east and they were amazed , gazing from afar upon the light of the silmaril , and it was very great .