He knew there were several species of antelopes, with whom curiosity was stronger than fear.

He had often lured the springbok within reach.

Why would not these obey the same impulse?
He determined to make trial.

At the worst he could only fail, and he had no chance of getting a shot otherwise.
Without losing a moment he thrust his hand into his pocket.

He should have found there a large red handkerchief which he had more than once used for a similar purpose.