Spectra of the six candidate spectroscopic gravitational lenses in the deflector galaxy rest frame. The spectra are ordered by putative deflector galaxy redshift, with the highest redshift at top. The discrepant lines are marked with a vertical line underneath the continuum. For 0223.110191, the discrepant line is confirmed to be [O II] by the detection of a second discrepant line (marked with a line above the continuum) at the wavelength of Hβ at the same redshift. From left to right, the vertical lines show the positions of [O II] λ3727, Hβ, [O III] 4959, [O III] 5007, and Hα. Regions around night‐sky lines at 5577 and 5892 Å are interpolated over. All available spectra for each object were coadded to improve the SNR. The spectrum of 0223.110191 extends to redder observed wavelengths than the others since it includes data obtained with a different spectrograph setup (§ 2). Note the different vertical flux scales.