October, of course, is the month for haunting, when lawns become littered with skeletons and witches fly in through branches of trees shedding their leaves. Store shelves are stocked with masks and makeup and an array of costumes, all designed to terrify. But on “Where Shadows Walk,” Franklin’s haunted history tour, you won’t find any of that. No masked hatchet men will jump from behind gravestones; black-eyed zombie undertakers will not be your guides, because, said Gregg Clark, the tour’s owner and guide, you won’t need them. The stories themselves elicit enough scare power on their own.