Extended nebular emission has been detected in forbidden S II 6716, 6731 A, forbidden N II 6584, 6548 A and H-alpha on a long-slit spectrum offset by 9 arcsec from P Cyg. Anomalously strong forbidden Ni II 6666.8 A emission was also detected. The forbidden S II doublet ratio yields an electron density of 600/cu cm. The forbidden N II and forbidden S II lines have been used to derive an N/S ratio which is insensitive to the adopted value of electron temperature. The N/S ratio is 33 +/- 5 by number, five times higher than solar, implying that the material has undergone CN-cycle processing which has converted most of the original carbon into nitrogen.