Sweeney Todd dogs alerting neighbors and the gendarmes. The two confess, and are summarily burned alive; the houses where the crimes took place are then razed. Whether this version of the story is based on "The String of Pearls" or its dramatisation, or a much older tale alluded to by Féval is unclear. In any case, it may well be the source for some recent versions that move the tale from London to Paris. In 1875, Frederick Hazleton's c. 1865 dramatic adaptation "Sweeney Todd, the Barber of Fleet Street: or the String of Pearls" (see below) was published as Vol 102 of
Sweeney Todd: The Demon Barber of Fleet Street New York, this tale of horrors was transformed into a mountain of steel in motion. Prince's scenic metaphor for "Sweeney Todd" was a 19th-century iron foundry moved from Rhode Island and reassembled on the stage, which critic Jack Kroll aptly described as "part cathedral, part factory, part prison, that dwarfed and degraded the swarming denizens of the lower orders." The massive scope of Prince's setting went beyond even Sondheim's intentions. Sondheim admits that his conception of the show differed from that of Prince: "Hal's metaphor is that the factory turns out Sweeney Todds. It turns out soulless, defeated, hopeless people.