Mud avalanches are rare now in the Alps, and are only caused by some exceptional event, such as the bursting of a glacier lake. Once they were common. Mountain-falls of any great size are also much rarer in the Alps now than they were formerly or than they are in some Himalayan regions. Alps and Andes have passed beyond the culmination of their dramatic stage. The mountains of Hunza, Nagar, and North Kashmir generally, are in the midst of theirs.
A mountaineer who has acquired a knowledge of how mountains are made, who has seen in action the forces I have briefly described, who has climbed among mountains in sunshine and storm, in heat and frost, who has spent nights on their cold crests, who knows how and where avalanches of snow, ice, and rock are likely to fall and has a realising sense of their force, their frequency, and their mass: a mountaineer who has attained by long experience a knowledge of the ways and action of glaciers, who can as it were feel their weight and momentum, in whose mind, when he looks at them, they are felt to be moving and vigorous agents, who sees the lines of motion upon them, their swing round corners, their energy in mid course, their feebleness at the snout:--such a man can look abroad over a mountain panorama with an understanding, a sense of the significance of what he beholds, which, far from detracting from its aspect of beauty, adds greatly to it.
To him a mountain area is no confused labyrinth of valleys and tangle of ridges, but the orderly and logical expression of a number of forces, and of forces that are still operative. To him what he beholds is not a painting on the wall, finished and done once and for ever, but, as it were, a scene in a play--a scene to which others have led up, and after which others will follow, all linked together and arising one out of another in unavoidable and necessary sequence. He perceives the arrangement of the peaks to be as logical as that of the men in a regiment on parade. Each stands in its own proper place, buttressed, and founded upon a broad and sufficient base. Its drapery of snow is not a kind of fortuitous whitewashing, splashed on anyhow by the whim of a storm. It is a vital part of the peak to which it adheres, owing all its forms to the modelling of that peak--here lying in deep and almost level snow-fields where broad hollows exist beneath it; there breaking into a mass of towering séracs where it is forced to fall over a step in its bed; there again reuniting in a smoothly surfaced area where the bed is once more relatively smooth; yet again opening a system of crevasses where its substance is torn asunder by unequal rates of flow.