54. How does Huck save the day?

Tom runs to the Welshman's house and tells him about the plan. They, in turn, run to save Widow Douglass.

“Please don’t ever tell I told you,” were Huck’s first words when he got in. “Please don’t—I’d be killed, sure—but the widow’s been good friends to me sometimes, and I want to tell—I will tell if you’ll promise you won’t ever say it was me.”
“By George, he has got something to tell, or he wouldn’t act so!” exclaimed the old man; “out with it and nobody here’ll ever tell, lad.”
Three minutes later the old man and his sons, well armed, were up the hill, and just entering the sumach path on tiptoe, their weapons in their hands. Huck accompanied them no further. He hid behind a great bowlder and fell to listening. There was a lagging, anxious silence, and then all of a sudden there was an explosion of firearms and a cry.