The mean Faraday rotation of 
-9 rad m-2 shown in
Figure 7 is consistent with the results of
[Simard-Normandin, Kronberg, & Button (1981)] for other extragalactic sources seen through
this region of the Galaxy (l = 116.7°, b = 21.5°). It is
therefore likely that the rotation measure screen seen in Figure
7 is primarily the foreground screen of our Galaxy.
The low apparent rotation measure and the smoothness of the
polarization structure shown in Figure 6 suggests
that the magnetic field in this source is well ordered. The field
configuration is entirely typical of older extended FR II sources, with
the E vectors lying approximately perpendicular to the ridge line of
the radio emission in most features.
We note that the greater variance and evidence for organized structure in the Faraday rotation of the southern lobe is the opposite of what would be expected if the jet sidedness were due to Doppler favoritism and the Faraday rotating medium were local to the source. We think it more likely that the Faraday rotation structure arises along the line of sight in our Galaxy.