During observations of the polarization of the impulsive emission from the source CP 0950 a further feature of the profile reported previously1,2 has become apparent. Using the integration technique described earlier3, observations suggested the presence of impulsive emission in the region between the main pulses. Fig. 1 is a mean profile obtained at 408 MHz using the Mark I telescope. The newly discovered “interpulse” is evident and lies 100 ms before the peak of the main pulse. Subsequent measurements have demonstrated that this interpulse is very highly polarized.