National Geographic : 1939 Jul
STALKING BIG GAME WITH COLOR CAMERA ALERT AND WARY IS THIS PRONGHORN, ATTRACTED BY AN INTRUDER Often while his fellows rest or graze, a watchman ascends a knoll where he has an unobstructed view in all directions. When he senses danger, he gives a snorting bark and the whole group of curious antelopes gallops up the hill for a look. If trouble seems near, away they bound. MOTIONLESS, A PRONGIIORN SUSPICIOUSLY WATCHES A RIVAL BUCK The tawny creature paid no attention to the author and was too lazy to pose, until another antelope appeared. Now the animal stands rigidly at attention, heedless of the blades of grass in his mouth.