In reply to Misha:
> that's a novel way of getting across!
But possibly more comforting than the proposal to get across the initial schrund on the Ryan Lochmatter, which we puzzled over for some time. My 2 companions were both quite large, I am not, so I was strongly incentivised to find a way to cross when a variant of dwarf-throwing was proposed.
On descending from the Dent d'Herrens, the way down, initially fairly clearly tracked in snow, ran out into chaotic and pathless loose scee, at a worrying angle and a feeling of being completely insecure, as though the whole slope could slide at any moment. Below it was a monster schrund, quite big enough to seize a bus or several, so the way across it was far from obvious from this hideous slope.
The rope was far more harm than use, so we unroped and I tentatively and nervously descended a sort of feeble gully, presently getting out of sight of my partner. Surprisingly there WAS a bridge across the void, with a deep, U-shaped channel in it. This channel was repeatedly swept by, and indeed formed by, heavy bouts of stonefall lasting 2-3 minutes each. This was clearly hazardous, on the other hand, there was no visible way across the monster gulf for as far as the eye could see. So I called Wayne down to join me, having several minutes to watch the display while he carefully did so.
This pause enabled me to spot a clear periodicity and pattern to the stonefall. It was all confined in the U shaped channel, indeed it was clear that it was the repeated stonefall that had bridged the gap. There would be a frantic burst lasting 2-3 minutes, then 1 or 2 late shots, then calm would return for another 5-10 minutes. But the stones were confined in the depths of the U, so I formed the theory that all one had to do was to descend as far as possible on the upper edge of the U, then wait for the next burst of stones. One then had to wait till they stopped, wait another minute and as fast as one possibly could dash across the point where the crevasse was actually bridged, 10-15 feet or so where there was no choice but to be in the stone-swept depths of the U, and then again as fast as possible, get out of the U onto the snow on the other side.
This was the theory. In theory there is no difference between theory and practice. In practice the difference can be considerable, but there were no other ideas as to how to tackle the problem. As I had suggested it, it seemed that I was the most suitable guinea pig.
So first I did it, then Wayne followed with equal success. We were now across the gap, and on an even glacier snow-slope beneath. "We should get going" he said, "it's still dangerous here".
Buoyed up by my recent success in proposing a way of crossing the apparently unpassable crevasse, I was dismissive. "We are quite safe here, the crevasse will swallow anything".
No sooner had these words passed my lips than I noticed, not the usual brick and paving stone sized blocks coming down, but a car sized lump heading straight for us. It was also not chanelled into the U as the smaller stones were, but heading straight down the slope.
My heart was in my mouth for several seconds, as it came directly toward us, and, for a fraction of a second after entering the gap, it seemed to hold its course. Then it did actually tumble into the void, with a mighty crash.
"Not that I am disagreeing with you that we should go" I said. "In fact we should go RIGHT NOW!"
Post edited at 21:21