failed, and their experience may, I think, be taken as conclusive. If, however, instead of the usual rope, a rope of half its weight and strength be used doubled, the problem is easily solved. One of these ropes is provided with two loops, one close to each climber. In the event of a bridge breaking, and as soon as the fall has been checked, the remaining climber drives his axe into the snow, cuts himself free from the looped rope and slips this loop over the axe head. The position of affairs is now as follows. The man in the crevasse has hold of a rope fast to the ice-axe; round his waist is a second rope, also round his companion's waist and held by him. The man in the crevasse pulls on the rope fast to the axe, and the man outside pulls on the rope round his companion's waist: in other words two men are engaged in lifting one. Every advance is made secure and permanent by the man outside, who holds no slack in his hands but pushes his way back from the crevasse, step by step, as his companion nears the lip. Arrived at this point, where the ropes will have cut deep into the snow, the engulfed man has only to rest his whole weight on the rope round his waist, and he can then jerk the other rope free from the snow, and get fresh hold higher up, and, little by little, extricate himself.
Whilst the rope so used is a fairly effective safeguard against this danger—as efficient perhaps24
