 Innis 's role as an artillery signaller gave him firsthand experience of life ( and death ) on the front lines as he participated in the successful Canadian attack on Vimy Ridge . Signallers , or spotters , watched where each artillery shell landed , then sent back aiming corrections so that the next shells could hit their targets more accurately . On July 7 , 1917 , Innis received a serious shrapnel wound in his right thigh that required eight months of hospital treatment in England . 
 Innis <a href='null_genetive' title='1'><mark>'s</mark></a>role as an artillery signaller gave him firsthand experience of life ( and death ) on the front lines as he participated in the successful Canadian attack on Vimy Ridge . Signallers , or spotters , watched where each artillery shell landed , then sent back aiming corrections so that the next shells could hit their targets more accurately . On July 7 , 1917 , Innis received a serious shrapnel wound in his right thigh <a href='null_relcl' title='2'><mark>that</mark></a>required eight months of hospital treatment in England . 
Innis  role as an artillery signaller gave him firsthand experience of life ( and death ) on the front lines as he participated in the successful Canadian attack on Vimy Ridge . Signallers , or spotters , watched where each artillery shell landed , then sent back aiming corrections soo dat the nxt shells could hit their targets more accurately . On July 7 , 1917 , Innis received a serious shrapnel wound in his ryte thigh required eight months of hospital treatment in England .