  We present the preliminary results of an image-subtraction analysis of the
Galactic globular cluster M79 (NGC 1904), as well as a new investigation of the
variable star population in NGC 1851. Both M79 and NGC 1851 have been
previously associated with the Canis Major overdensity, which has been
suggested to have an extragalactic origin. We found 6 new RR Lyrae in M79, and
also recovered 3 previously known RR Lyrae. The average period of the 5 ab-type
RR Lyrae is 0.68 ~ d, corresponding to an Oosterhoff II classification -- which
is unusual, though not unprecedented, for systems of extragalactic origin. We
also report on the discovery of at least 4 previously unknown variables in NGC
1851.
