Comparison of STIS and COS spectra of the region surrounding the He II emission line. The black histogram shows the average STIS 2001 spectrum. The blue histogram shows the unweighted average COS spectrum from the 12 December 2016 and 21 December 2016 observations. Both spectra have the continuum subtracted as well as the underlying emission of the C IV emission line. The STIS spectrum is scaled up by 1.2× to match the flux in the far wings of the COS spectrum. The solid red line is the best-fit emission model for the COS spectrum. The velocity scale along the top axis has zero velocity for He IIλ1640.45 at the host-galaxy redshift of 0.00973 (Theureau et al. 1998). All narrow absorption features are foreground ISM lines.