To descend on the double the last man grasps both ropes in his hands immediately below the belay, drawing them taut before he starts to see that the belay is rightly arranged for the strain. He descends, using what footholds he can on the rock, or, failing them, by frankly swarming down. If he is unroped from his party, and using the only rope as a double, a protection in case of a slip is to tie both ends of the doubled rope to his own waist before descending. The arms in such descending should be kept bent. The most trying point is just before he reaches the stance, where the double ropes are resting on the ledge and are no longer kept taut by their own weight in suspension. If the climber is using one of the leg brakes below described, its tension will still keep the ropes taut for his hands. If not, and he is descending by hands alone, finding what foothold he can upon the rocks, he should get the man below to pull on the ends of the two ropes and keep them taut till he is down. If he is descending first of the party, and therefore there is no one below, a convenient device to the same end is to sling his sack down on the end of the ropes and leave it just suspended.
Brakes.
Gloves protect the hands; but long descents are often too great a strain for amateur fingers, and the chance of their slipping or cramping cannot be risked. In this case one of the following leg brakes should be used. Experienced climbers always use them where footholds fail, for however short a distance.
The Foot Brake.—This is the commonest device in gymnasium rope-climbing. The body is turned sideways to the rock, the double rope inside it. The twin ropes are caught up under the sole of the inside boot and out over the instep of the outside boot. The boot edges are clenched upon the ropes between them, and the amount of friction over the boots resulting allows the weight, with small effort of boot clenching, to slip in easy control down the ropes. The body is kept upright by the hands grasping the rope above.
The Thigh Brake.—This is the most frequently used in the Alps, as rock descents are seldom entirely vertical or overhanging, and a sudden extrusion of rock under the feet when using the foot brake upsets the balance; whereas with the thigh brake the body can lie sideways against a projecting or convex curve of rock, and slide down the boss, swinging to the perpendicular again where it ends, without effort at balancing. The right method is to turn sideways to the rock, slightly raise the outside thigh, pass the double rope under it high up between the legs, and grip the farther lengths of rope so passed with the outside hand, palm upwards. The inside hand grasps the tightened ropes above, with bent arm, at about the level of the head. The outside hand, by lowering or lifting the slack lengths below or above the level of the raised thigh, diminishes or increases the friction of the rope round the thigh, and so controls the pace. If a complete rest is needed, the outside hand merely brings up its double rope to join that held by the inside hand, and a very light clasp of the two hands together on the four ropes so united, aided by the almost total arrest of the rope passing under the thigh, easily stops the descent. It is a mistake, but a frequent one, to start the rope round the inside thigh. Round the outside thigh is safer and more comfortable; and it leaves the inside leg free to use any foothold that turns up.
The same fashion of brake can be used under the foot instead of under the outside raised thigh. But this necessitates holding the leg very rigid, and makes it more difficult to balance. Nor does the rope run as smoothly under the boot as under the thigh.
The Body Brake.—This brake, which has several variants, need practically never be used. The amount of friction introduced demands of a climber almost more effort to push his way down the rope in constricting jerks than he would use in swarming down it without a brake at all. The simplest form is to pass the double rope under both thighs slightly bent, back, across and in front of the body, and out, round and behind the shoulders, to the control of the outside hand.
The Chair.—As I am dealing with these devices, a note upon this may not be out of place. Except for an injured man it can rarely be required in descending; although I have, on occasion, employed it for a beginner who could not be trusted to manage any form of brake that left anything to his discretion. But it may be found of use in excessively difficult passages of ascent, where the leader has only got through with great difficulty and where the possibility of a less brilliant member of his following having to be hauled up clear on the rope and remain suspended for a perceptible time makes it necessary to find some sort of attachment that will not suffocate him. Men vary in their resistance, but no man can hang clear, on a rope tied round his chest, for more than two minutes without partial suffocation and considerable pain. In ascending, both hands are needed for climbing, and no form of the usual descending brake is therefore suitable. The chair is formed by making two easy loops for the thighs opposite one another on the rope, secured by a sound central knot (triple bowline). Through these loops the climber passes his legs, as through breeches. If he then straightens his thighs, he can sit in easy balance in the loops; but as security against falling out backwards he should knot a scarf or cord round his body and make it fast to the main rope in front of him. In this chair he is perfectly free to climb and use his hands and feet so long as they help him; and when he slips off, he swings comfortably clear in his loops. He has only to remember to keep his body and thighs straight, so as not to sag backwards and downwards out of the slings. The men above do the rest. The chair is much used by bird’s-nesting cliff climbers, who desire to keep their hands free, and who may have to remain suspended for long periods.
Springing the Rope.
After the last man is down on the double rope comes the crucial moment, when the rope has to be run or ‘sprung’ off the belay from below. Nothing is more irritating, or of more frequent occurrence, than to find that the double rope, after running a certain distance round the belay, has stuck, and that a laborious and often hazardous reascent, trusting to its partial attachment, is necessary in order to release it. If the belay has been well chosen, or the sling well fixed, it ought to run without difficulty. To pull it off without hitch it is essential first to see that there is no knot in it, especially at the running end, where the fatal knot beloved of guides and many amateurs, for purposes of their waist-noose, generally lurks as a permanent threat.