Sentence:  Giving us a last embracing and comprehensive glance he drew it, already pivoting Jupiter on the tight snaffle; his hair tossed beneath the cocked hat, the sabre flashed and glinted; he cried, not loud yet <WSD>stentorian</WSD>: "Trot! Canter! "Charge"!" 
Meaning of the word marked with <WSD> tags:  Loud, powerful, booming, suitable for giving speeches to large crowds.