We present measurements of the differential and total cross sections
and the Lambda polarization for the reaction K- p to eta Lambda
from threshold to pK- = 770 MeV/c, with much better precision
than previous measurements. Our cross-section data show a remarkable
similarity to the SU(3) flavor-related pi- p to eta n cross-section
results. The reaction K- p to eta Lambda at threshold is dominated
by formation of the intermediate Lambda(1670)1/2- state.