  The High Resolution Echelle Spectrometer on the Keck I telescope has been
used to measure nine radial velocities having a median precision of 2 km/s for
seven red giants belonging to the isolated dwarf spheroidal galaxy Andromeda
II. We find a weighted mean radial velocity of -188+/-3 km/s and a central
velocity dispersion of 9.3+/-2.7 km/s. There may be evidence for a radial
velocity gradient across the face of the galaxy, although the significance of
this result is low due to the small number of stars having measured velocities.
Our best estimate for the global mass-to-light ratio of And II is M/L_V =
20.9^{+13.9}_{-10.1} in solar units. This value is similar to those of several
Galactic dwarf spheroidal galaxies and is consistent with the presence of a
massive dark halo in Andromeda II.
