He heard Scoutmaster Ned humorously belittling the exploits of his own heroes.

No, Peter Piper would not step rashly into that bantering throng with that one exploit of his own.
So he stood in the bay window, half concealed by the old-fashioned melodeon, and watched them.

Just gazed at them....
And when they all crowded out he lingered behind and whispered to the music-master of the milk cans, "Don't tell them, Ham; please don't tell them anything--about me." And so the party made their way along the dark road and Peter followed and heard the flattering comments and fraternal plans involving the little hero from Bridgeboro.

Evidently they were going to keep Scout Harris with them and have him patented, from what Peter overheard.
When they came to Peter's little home, Scoutmaster Ned discovered and spoke to him while Pee-wee was making an enthusiastic pronouncement about Jim Burton's Packard car.
"You live here, sonny ?" "Y--yes, sir," stammered Peter, quite taken aback.
"Well, now, I'll tell you what we're going to do.

We're going to roll this stalled car a little way into your yard to get it off the road.