Sentence:  With our shaggy jackets drawn about our shoulders, we now passed the Tomahawk from one to the other, till slowly there grew over us a blue hanging <WSD>tester</WSD> of smoke, illuminated by the flame of the new-lit lamp. 
Meaning of the word marked with <WSD> tags:  Something that overhangs something else; especially a canopy or soundboard over a pulpit.