On a Conan Doyle model, DeAndrea (Killed in the Ratings, 1978) has fashioned some unusually well-textured historical-mystery fluff set in 1896 New York--where police commissioner Theodore Roosevelt is trying to make the town as upright and no-nonsense as himself. But anarchists are planning to blow up the old Croton Reservoir on 42nd Street during a millionaire's wedding reception nearby (Wm. J. Bryan is set to attend), having already compromised the millionaire with a piece of sexual blackmail to take in one of their own as a servant. Murders ensue, beatings and shady dealings too--and TR pieces it all out with his trusty aide, ex-beat-cop Dennis Muldoon. The key? ""The Pink Lady""--an ex-prostitute who was once the millionaire's mistress. Nicely plotted, buoyantly inconsequential.