  We analyze published reverberation mapping data for three Seyfert galaxies
(NGC 3227, NGC 3516, and NGC 4593) to refine the mass estimate for the
supermassive black hole in the center of each object. Treatment of the data in
a manner more consistent with other large compilations of such masses allows us
to more securely compare our results to wider samples of data, e.g., in the
investigation of the M_bh-sigma relationship for active and quiescent galaxies.
