Whistlers recorded at four stations along the geomagnetic meridian near Roberval, Canada, on July 23, 1979, have been analyzed. They showed a spatial attenuation rate as high as ~6 dB/100 km, which is appreciably larger than previous theoretical predictions. The wave polarization of these whistlers was also analyzed: the wave polarization was a maximum (right handed) at the station where wave intensity was a maximum. The wave polarization was also righ handed at a station distant from the waves exit region. The locations of the wave exit region inferred from the intensity maximum were compared with the L values of the whistler paths derived from the dispersion analysis. We obtained a consistent relation between them when uncertainties in the dipole field model are taken into account.