1: Jane and Toby Chilton above the deep depression that holds the entrance to Hidden Hole. (photo: Juan Corrin)
2: Pete Eagan and Nick Powell outside the entrance to Hidden Hole.
3: The deep depression that holds the entrance to Hidden Hole. (photos: Dave Bell)
4: Peter Fast and Torben Redder outside Hidden Hole before their overnight bivi, Easter 2013. (photo: Louise Korsgaard)