With the crawling, for instance, Bradey had been on top of a snow bridge that crossed a crevasse.
This cleft had been spanned by a snow bridge, now broken, and to the edge of which footsteps could be traced.
A snow bridge broke and he fell into a crevasse, where only his knapsack saved him from breaking his neck.
A snow bridge had given way under the weight of the pony, and the animal had fallen into a crevasse 1000 feet deep.
On either hand the rift of the crevasse extended, and above was the small hole in the snow bridge through which I had shot.
On reaching Wild Brook they had seen that the snow bridge had fallen, and at first they had been badly frightened.
As it was, several of the dogs were lost when, a snow bridge crumbling, the animals fell into a crevasse.
Thus he was, as it were, on a snow bridge, of which the surface might at any moment give way.