Left: Hα archival HST image (with some contamination of [N II]) of CRL 618 shown with a linear scale (rotated so that the bipolar axis is approximately parallel to the ordinate). The STIS slit positions (“1” and “2”) are superimposed to the HST image. The labels identify the position of several features. The compact central HII region (elongated in the East-West direction) is also overplotted to the Hα image. Right: [S II] archival HST image of CRL 618 shown with a linear scale (rotated so that the bipolar axis is approximately parallel to the ordinate). The labels identify the position of several features.