Far below them was a strange sight.

In the center of the clearing were four huge African elephants
solemnly conducting a sort of Brobdingnaggian game of tag. One of
the great beasts would tap the other with its trunk and then would
scamper away till it in turn was "tapped" by a blow that would have
swept a small regiment off its feet.

Frank pushed over a lever and swung the ship in a circle so that
they might watch the great animals to better advantage. Suddenly
the boys saw one of the elephants, evidently seized by sudden rage,
start goring one of its companions with its huge tusks. The
attacked animal had no chance, and but for the boys would speedily
have been killed.

"I'm going to give that big bully a shot," exclaimed Harry, and he
got out one of the heavy rifles from the rack under the starboard
transom.

"Wait, I'll drop a bit," said Frank.

In response to his manipulation the aeroplane dropped till she
hovered not more than two hundred feet above the great animals.
Then a strange thing happened. The shadow of the craft fell upon
the center of the clearing in front of the dueling beasts and the
on-looking pachyderms, and as it did so the bully stopped goring its
mate and gave a snort of astonishment.

Its note of surprise quickly changed to a loud trumpet of terror as