(i) keep body and soul together : Peddler’s business of selling rat traps was not profitable. So to keep body and soul together he had to resort to begging as well as to steal in a small way to satiate his hunger.
(ii) hunger gleamed in his eyes ; he was so hungry that the feeling of his being hungry shone with dim light from his eyes itself.
(iii) unwonted joy : means the unaccustomed or unusual joy.
(iv) nodded a haughty consent : gave a nod of acceptance in an arrogant manner.
(v) fallen into a line of thought : started thinking of a single significant thought.
(vi) things have gone downhill: the situation or the conditions of his life have been badly deteriorated.
(vii) plods along the road : he walked laboriously along the road.
(viii) impenetrable prison : means a prison or a jungle that cannot be entered, passed through or seen through.
(ix) eased his way : his way was made less unpleasant, painful or severe by coming close to the furnace.