  We present axisymmetric, orbit superposition models for 12 galaxies using
data taken with the Hubble Space Telescope (HST) and ground-based
observatories. In each galaxy, we detect a central black hole (BH) and measure
its mass to accuracies ranging from 10% to 70%. We demonstrate that in most
cases the BH detection requires both the HST and ground-based data. Using the
ground-based data alone does provide an unbiased measure of the BH mass
(provided they are fit with fully general models), but at a greatly reduced
significance. The most significant correlation with host galaxy properties is
the relation between the BH mass and the velocity dispersion of the host
galaxy; we find no other equally strong correlation, and no second parameter
that improves the quality of the mass-dispersion relation. We are also able to
measure the stellar orbital properties from these general models. The most
massive galaxies are strongly biased to tangential orbits near the BH,
consistent with binary BH models, while lower-mass galaxies have a range of
anisotropies, consistent with an adiabatic growth of the BH.
