towards the cliff, and then stopped to admire the contrast of the brilliant pinnacles of ice with the blue sky. Without a warning, a huge slice of the glacier broke away, and fell over the cliff on to the lower portion with a thundering crash. Fragments rolled beyond me; although, fortunately, not in my direction. I fled, and did not stop until off the glacier; but before it was quitted learned another lesson in glacial matters: the terminal moraine, which seemed to be a solid mound, broke away underneath me, and showed that it was only a superficial covering resting on a slope of glassy ice.
On the steep path over the Gemmi there were opportunities for observing the manners and customs of the Swiss mule. It is 
not perhaps in revenge for generations of ill-treatment that the mule grinds one's legs against fences and stone walls, and pretends to stumble in awkward places, particularly when coming round corners and on the brinks of precipices; but their evil habit of walking on the outside edges of paths (even in the most unguarded positions) is one that is distinctly the result of association with man. The transport of wood from the mountains into the valleys occupies most of the mules during a considerable portion of the year; the faggots into which the wood is made up project some distance on each side, and it is said that they walk intuitively to the outside of paths having rocks on the other side to avoid the collisions which would otherwise occur. When they carry tourists they behave in a similar manner; and, no doubt, when the good time for mules arrives, and they no longer
