  Based on an approach recently proposed by us, simultaneous
$\chi^{2}$-analyses are performed for elastic scattering, direct reaction (DR)
and fusion cross sections data for the $^{6}$He+$^{209}$Bi system at
near-Coulomb-barrier energies to determine the parameters of the polarization
potential consisting of DR and fusion parts. We show that the data are well
reproduced by the resultant potential, which also satisfies the proper
dispersion relation. A discussion is given of the nature of the threshold
anomaly seen in the potential.
