"Have Cole leave his force pump on guard," suggested Vincent, "That pump ought to be able to put out a fire all alone."

"Humph! That pump's all right, if you do make fun of it!" declared the owner of the latest addition to the fire apparatus. "It'll throw a stream farther than either of the big hose on this engine."

"Well, let's run the barge ashore, then pole back and get our engine off," proposed Bert. "I guess it's safe enough to leave the barge now."

They tied the blackened load of lumber in a little shallow cove, where, if it did start to burn again, no damage would result. Then they went back to the lumber yard, where they found a big crowd waiting them. The fire on the dock had been extinguished by members of the bucket brigade and had not amounted to much.

"Boys, I want to shake hands with every one of you!" exclaimed a voice, as Bert led his command ashore. "You did me a great service to-night, and I'll not forget it. But for your prompt action my lumber yard would have been destroyed and several of my valuable barges besides."

The speaker was Mr. Perrett Bergman, owner of the lumber yard, and, as each boy stepped ashore, he shook him warmly by the hand.

"Yes, Mr. Bergman, those boys certainly did themselves proud," said
Mayor Appelby. "They're almost as good as a regular department."

"That's what they are. Well, I'll have something to say about that later. Now, I must go and see if there are any stray sparks around anywhere, and I want to investigate this fire. I have an idea it was set by tramps. That barge came down the lake early this evening, and the men in charge of it told me they threw a tramp overboard who was stealing a ride on it."

"Threw him overboard?" repeated Mr. Appelby.

"Yes. I told them that was the wrong thing to do, as the man might have been drowned, but lumbermen are rather rough. However, the tramp swam ashore, they told me. I have an idea he might have set the barge afire for revenge."