Snow-Trolls and Stone-Giants in Middle-earth

Originally posted on A Tolkienist's Perspective:
The evidence for the existence of both snow-rolls and stone-giants haunting the deep, shadowy passes of Middle-earth is, at best, poor. To begin with, we have a stronger argument in favour of giants. Mentioned several times in The Hobbit, there is an obscure passage during the Dwarves’ journey…