Faraday depth spectra for selected lines of sight. The top left panel shows the locations of the lines of sight. Panel A is at the location of the polarized emission from the giant radio galaxy WNB 0313+683, which shows two Faraday depth components at −11.4 and −8.6 rad m^-2 (which overlap in angular position at this resolution), a Stokes I leakage feature at −0.5 rad m^-2, and a diffuse emisison peak at −3 rad m^-2. Other panels are at locations containing only diffuse emission, and show either one (D) or two (B, C, E, F) clear peaks.