Nero roared. A mountain lion screamed.

A great gray shape, moving swiftly despite its lumbering gait, rounded a clump of bushes and moved out on the smooth green sward of the park. It was the elephant. With trunk reared high, emitting screams of rage, with huge ears flapping, the beast headed for the cat-cages.

Riggs turned and pounded madly toward the administration building. Behind him Pop puffed and panted.

Shrill screams rent the air as early visitors at the zoo scampered for safety.

Animal voices added to the uproar.

The elephant, turning from his original direction, charged through the two acre paddock in which three pairs of wolves were kept, taking fence, trees and brush in his stride.

On the steps of the administration building. Riggs looked back.

Nero, the lion, was dripping water! The water that theoretically should have kept him penned in his cage as securely as steel bars!

A keeper, armed with a rifle, rushed up to Riggs.

'All hell's broken loose,' he shouted.