  We present the results of K-band imaging polarimetry of seven 3CR radio
galaxies at redshifts (z) between 0.7 and 1.2. We find strong evidence for
polarization in three sources: 3C 22, 3C 41 and 3C 114. Of these, 3C 41 shows
strong evidence of having a quasar core whose infrared light is scattered by
dust. We also find some evidence for polarization in 3C 54 and in 3C 356. The
two pointlike sources (3C 22 and 3C 41) and the barely-elongated 3C 54 appear
to have of order ten per cent of their K-band flux contributed by scattered
light from the active nucleus. We conclude that scattered nuclear light can
form a significant component of the near-infrared light emitted by
high-redshift radio galaxies,and discuss models in which the scattering
particles are electrons and dust-grains.
