Sentence:  Thus the red damask curtains which now shut out the fog-laden, drizzling <WSD>atmosphere</WSD> of the Marylebone Road, had cost a mere song, and yet they might have been warranted to last another thirty years. A great bargain also had been the excellent Axminster carpet which covered the floor;nb.... 
Meaning of the word marked with <WSD> tags:  The air in a particular place.