Each number stood for a letter of the alphabet: M-A-H-E, or M-R-E (or "Mr.E" or "Mystery" or "Mr.Enigma" or "Mr.E.Nygma" - the villain).The Riddler held Chase captive in his Riddler""s lair on Claw Island - using her as bait to attract Batman.To prepare for the Baroness"" arrival, she teaches them how to sing, beginning by giving a name to the fundamental notes of the scale - "Do-Re-Mi.You don""t take a bath in it.They wrote you a letter.But then you""d have to be able to read.According to Yelburton, Mulvihill""s main duty, now hat he is employed by the Water and Power Company, is to protect against numerous threats of protesting farmers in the Valley to blow up the city""s reservoirs:Well, it""s this darn drought.The survivors were put in cages.The army used some of them for target practice.We could take our scientific pick of the rest." Zira even revealed that they were advanced enough to perform experimental brain surgery on living humans, and even tried to stimulate their atrophied speech centers.