Suddenly the big, black cat arched her back and hissed at them! “Meow! Meow! Meow! Meow! P-f-f-f-f-f-f-f!”

Jimmy laughed and laughed when the twins ran back pell-mell! He knew they were afraid. “Fall in line!” he said, sternly. Then they marched on down the street.

One day Jimmy decided to be a circus man. “I will have trained dogs!” he said.

Daddy taught him some tricks. First they got a big barrel-hoop. Troubles and Bubbles did not want to jump through it at first, but soon they learned how. Then they thought it heaps of fun.

Soon they could do lots of tricks. They sat up and begged. Bubbles could not hold his front paws as gracefully as Troubles.

It was so hard to teach them to walk! Bubbles seemed to be bow-legged, and Troubles pigeon-toed, but at last they succeeded in taking ten steps at a time.