We stood there as the mist began to clear. At first nothing was visible at all, but gradually the clouds pulled back their lace skirts and the lake, one of the two in the name 'Glendalough' (glen of the two lakes) was slowly revealed. Over a period of fifteen minutes what had been a gossamer world regained its colour and form, revealing the incredible beauty of the upper lake. High on the hill before us, my friend told me, up a treacherously winding path of scree, is a cave where the monks from St. Kevin's monastery in the valley would come to fast and pray while the wild Irish winter howled and crashed over the dark water. A Yeti was once sighted here.