Analysis of high-resolution (lambda/DELTAlambda = 150,000) spectra of
classical barium giants reveals that an unidentified line is a major c
ontributor to the stellar-absorption feature at 6707.8 angstrom attrib
uted previously to a blend of CN lines and the Li I resonance doublet.
The strength of the unidentified line is well correlated with the str
ength of a Ce II line. In contrast to published reports of positive id
entifications of absorption due to the Li I doublet, an acceptable fit
of a synthetic spectrum to the observed spectrum of a barium giant is
obtainable without a significant contribution from the Li I doublet.
Upper limits to the Li abundance of classical barium giants are now co
nsistent with those expected if CH subgiants evolve into barium giants
.