Tom and his gang plan to be involved in what Activities?

In essence, Tom and his gang will be involved in activities of the imagination, reenactments of what Tom has read about in books.

"Now," says Ben Rogers, "what's the line of business of this Gang?"

"Nothing only robbery and murder," Tom said.

"But who are we going to rob?—houses, or cattle, or—"

"Stuff! stealing cattle and such things ain't robbery; it's burglary," says Tom Sawyer. "We ain't burglars. That ain't no sort of style. We are highwaymen. We stop stages and carriages on the road, with masks on, and kill the people and take their watches and money."

"Must we always kill the people?"

"Oh, certainly. It's best. Some authorities think different, but mostly it's considered best to kill them—except some that you bring to the cave here, and keep them till they're ransomed."