There are idioms in there, some of them are:
Scrooge had often heard it said that Marley had no bowels, but he had never believed it until now.
The body of Marley's ghost is completely transparent, so Scrooge can see right through him. As a ghost, Marley lacks internal organs, just as when he was alive he lacked "the bowels of mercy," meaning compassion.
The imagery in there would be:
It was cold, bleak, biting weather: foggy withal: and he could hear the people in the court outside, go wheezing up and down, beating their hands upon their breasts, and stamping their feet upon the pavement stones to warm them. The city clocks had only just gone three, but it was quite dark already—it had not been light all day—and candles were flaring in the windows of the neighbouring offices, like ruddy smears upon the palpable brown air. The fog came pouring in at every chink and keyhole, and was so dense without, that although the court was of the narrowest, the houses opposite were mere phantoms.
Hope this helps :D