So, searching for the source, Gwyn sought the spring from where waters welled up from the Otherworld, though it was said to be a perilous place with a veil of spell craft around it. It was because he knew certain words of power that he did not worry about that, and he spoke these words as he approached the place where the spring was reputed to be, though no spring could be seen. As he spoke the air about the place became like a clearing mist that shone diffusely as he drew near and he saw before him a bed of fine gravel from which water bubbled up out of the earth and out of this water a women taking shape before him.

In her hands she held a vessel of transparent crystal into which water flowed so he approached her to ask for a drink of the water, but as he spoke she began to dissolve once more back into the welling spring. He reached out for the vessel and tasted just a few drops of the water before she was gone and the well itself began to draw back the flow of water. 

But it was enough, for great knowledge and wisdom had welled up within him with those few drops and he was overcome both with bitter grief and with great joy as he saw clearly how things were. He knew he must retreat from that place or be carried off for all time to the Otherworld as the place shifted its form once more. So he fled, but with him was a vision that never left him, though it was the cause of a trouble that he carried with him for all his days with his deep seeing into the weave of the world that others could not see and it took great strength to bear it.