100m from the right turn is a snow field on the right, with the sound of falling water at its lower edge. This is the entrance to 91. The bolt is at the NE end of the rift.
Entrance 91 looking north towards 93 and Schönberg | Closeup showing location of tag and paint markings (original here) |
(Photos © Andy Waddington 1990 and Olly Betts 1999)