"Well, Tormance is a big place. But I have an infallible rule, Corpang. As I come from the south, I always go due north."
"That will take us to Lichstorm."
Maskull gazed at the fantastically piled rocks all around them. “I saw these rocks from Matterplay. The mountains look as far off now as they did them, and there’s not much of the day left. How far is Lichstorm from here?”
Corpang looked away to the distant range. “I don’t know, but unless a miracle happens we shan’t get there tonight.”
[Source: A Voyage to Arcturus]
Can you please explain what you understand to be the meaning of "look as far off as they did them"? As is one of the most tricky words in English. I cannot understand the meaning of "as" here and "they did them" part. The context doesn't give a clue, either. Please help me understand.