Big John, surely a pessimist is someone who, on smelling flowers, looks for a funeral!
The Hippopotomon.... page referenced by SharonA gives the Welsh place name "Llanfairpwll..." as containing 58 letters. Unfortunately this is a slight exaggeration. It contains only 52, as both 'Ll' and 'ch' are individual letters in the Welsh alphabet.
Sneaky quiz question, how many times does the letter 'l' appear in the placename "Llanfairpwllgwyngyllgorgerychwyrndrowllllantysiliogogogoch" ? Answer, once only, in 'Llantysilio'