Sentence:  Tecumseh listened with a gloomy kind of submission; the playful animation of childhood no longer gladdened his countenance; the joyous <WSD>light of his eye</WSD> was quenched, and a settled shade rested on those features, that were wont to beam with pleasure. 
Meaning of the word marked with <WSD> tags:  The way one's eye's sparkle with joy and life.