Sentence:  To Temple, sitting in the cottonseed-hulls and the corn-cobs, the sound was no louder than the striking of a match: a short, minor sound shutting down the scene, the instant, with a profound finality, completely isolating it, and she sat there, her legs straight before her, her hands limp and palm-up on her lap, looking at Popeye's tight back and the ridges of his coat across his shoulders as he leaned out the door, the pistol behind him, against his flank, <WSD>wisping</WSD> thinly along his leg. 
Meaning of the word marked with <WSD> tags:  To produce a wisp, as of smoke.