By Brandy McDonnellAn abbreviated version of this story appears in the Sunday Life section of The Oklahoman. Fairy fable: Cimarron Opera stages Gilbert and Sullivan's 'Iolanthe'NORMAN – Their footsteps smacking smartly, Pat Meirick and Jason Haddox are working to master the art of marching with military precision and singing opera with the same exactitude.Both playing the part of Private Willis, a night guard at London’s Palace of Westminster, the performers pace behind director and choreographer Kassie Carroll as she parades across the stage to the tune of the Gilbert and Sullivan ditty "When all night long a chap remains.”“When you stop here, you’re going to talk to the audience for a little bit,” Carroll instructed during a recent rehearsal at the University of Oklahoma’s Catlett Music Center.Read more on NewsOK.com