Especially to have been written in 1912

You'd be surprised - a hundred years earlier, inspired by the Year Without a Summer of 1816, Lord Byron wrote a poem called "Darkness", that I've frequently seen quoted as a possible inspiration for Hodgson:

I had a dream, which was not all a dream.
The bright sun was extinguish'd, and the stars
Did wander darkling in the eternal space,
Rayless, and pathless, and the icy earth
Swung blind and blackening in the moonless air...

The Night Land is a weird book, in that it's incredible despite its prose and writing style, not because of it. Even a hundred years later, it stands out for not being like our world and culture with one or two sci-fi changes, but being something else.