Got the correct answer thanks to the indirect reference to the Tell-Tale Heart in 75a, but I failed to see the progression in the themers, simply because I started with the AL in 25a's "BALANCE" and noticed that every other themer also had an AL in there (as does EDGAR ALLAN POE). In order to emphasize the buildup from A to ALLA, wouldn't it have been preferable to have avoided having both an A and an AL in 25a?