his ability to stay calm among those two thousand people who were all waiting for him to shoot the elephant.
Explanation:
Orwell's spine was his ability to stay calm among those two thousand people who were all waiting for him to shoot the elephant that had gone mad.
The lines "For at that moment, with the crowd watching me, I was not afraid in the ordinary sense, as I would have been if I had been alone." reveal that Orwell was strong and determined to kill the mad elephant while many would be scared and nervous.
