Googling “Holliday’s Hill” and “Cardiff Hill” does not answer Henry Sweets'
question but turns up a comical and illustrated tour of Hannibal in the
March 1953 _Atlantic_ by long-time Forum member Charles Boewe (1924-2016,
RIP):
https://www.theatlantic.com/magazine/archive/1953/03/hannibal-visited/642420/