"Don't be afraid!" called the engineer, laughing. "He's so gentle he wouldn't hurt a baby!"
And how strangely the dog was acting! He would jump up first on Hal, and then on Mab, trying to lick their faces and hands with his red tongue.
"Oh dear!" cried Mab, who was a little bit frightened.
"He won't hurt you!" exclaimed the engineer. "Here, Spot!" he called.
"Leave the children alone. Be good, Spot!"
But the dog would not mind. He jumped up on Hal, barking as loudly as he could, and wagging his tail so hard that it is a wonder it did not drop off. The animal seemed wild with delight.
"Why! Why!" cried Mab, as she looked carefully at the dog when he stood still a moment to rest after all the excitement. "That dog looks just like our Roly-Poly, only Roly was white and not spotted black and white," said Mab.
"Well, when I got this dog he was all white," explained the engineer.
"He got spotted black by accident."
"I wonder if that could be Roly?" spoke Daddy Blake thoughtfully.
"Here, Roly-Poly!" he called. "Come here, sir!"
In an instant the dog made a jump for Daddy Blake, barking joyfully, and almost turning a somersault.
"I believe it is Roly!" shouted Hal. "It's our dog!"