  Deep infrared and optical images are presented of three proposed remnants of
Thorne-Zytkow Objects (TZO). In particular, the IR data go several infrared
magnitudes deeper than previous observations and in at least one case reveal
the existence of weak objects within the error circles. It is argued, however,
that none of the objects is likely to be the binary companion to the X-ray
source in that region. These data present severe limits on any possible star or
residual envelope at the distances of the respective X-ray objects.
