Large portions of each of them are quite unclimbable, and much of them is too easy to be worth doing, so that the amount of interesting climbing to be met with is less than might be expected.
"Climbing in The British Isles. Vol. 1 - England"
W. P. Haskett Smith
If the youngsters and amateurs wanted to amuse themselves plotting hypothetical attacks on unclimbable sierras, that was all very well, but it was, if nothing worse, a great waste of time.
"The Planet Savers"
Marion Zimmer Bradley
While here, I rode round northward to inspect that side of this singular and utterly unclimbable mountain.
"Australia Twice Traversed, The Romance of Exploration Australia Twice Traversed. The Romance Of Exploration, Being A Narrative Compiled From The Journals Of Five Exploring Expeditions Into And Through Central South Australia, And Western Australia, From 1"
Ernest Giles