"But I must say, some of the young fellows on the street are rather careless." Scarcely had Dick spoken when the big machine rounded a corner and speeded through a crowd of what were evidently factory hands.

They were shooting off pistols and firecrackers and raised a great din.
Then one ugly looking young fellow lighted a firecracker and sent it toward the automobile.

It landed directly in Dora's lap.
"Oh!" screamed Dora, and tried to draw away.
As quick as a flash Dick leaned forward and caught up the firecracker.
As he threw it out of the automobile it exploded close by.
"Do that again, and I'll come back at you!" shouted the elder Rover, and shook his fist at the fellow in the street.
"Dick, did it hurt you ?" asked Dora, anxiously.
"Oh, it burst my little finger a trifle, that's all," was the reply.
The finger smarted quite some, but Dick did not want to show it.
"We ought to go back and punch his head," was Sam's comment.
"Wonder if they'll try that game on the other auto," said Fred, as he arose to look back.
He saw the street rough throw a lighted firecracker at the other machine.

It landed on the floor of the tonneau, but like a flash Tom was after it.

The fun-loving Rover held it up, took aim, and sent it straight at the fellow who had first launched it.