Harvey Manning

And two of the people at that gathering are very prominent figures in American mountaineering history.

One was Harvey Manning, and he was the editor and driving force behind Mountaineering, Freedom of the Hills, which was first published in 1960.

The other was Edward LaChapelle, who was one of the great pioneers of avalanche science.

And the two of them, when they saw these photos, they zeroed right in on this photo of these group of mounds that...