This quote is sometimes attributed to H.G. Wells, and is found in Wells' short story, The Country of the Blind.
Masen, a very well read biologist, claims that the quote originates with a Roman gentleman by the name of Fullonius, who wrote Caecorum in patria luscus rex imperat omnis. Highbeam research claim that it is actually 'in regione caecorum rex est luscus' (Erasmus Adages is given as the source). My Latin is not good enough to decide which sounds better.