“Yes.”
“How deep is it?”
“Perhaps five hundred or a thousand feet.”
“You say it flows. How can hard ice flow?”
“It flows like water, though invisibly slow.”
“And where does it come from?”
“From snow that is heaped up every winter on the mountains.”
“And how, then, is the snow changed into ice?”
“It is welded by the pressure of its own weight.”
“Are these white masses we see in the hollows glaciers also?”