Archival and the EDIBLES spectra in the wavelength range of the Na I lines (top two panels) and the Ca I line (third panel) toward HD 167264. The fourth panel shows the residuals of the archival spectra after subtracting the 2016 EDIBLES spectrum in the range of the Ca I lines. The bottom panel shows the corresponding column densities for the three different Ca I components over time. Note the very clear increase in column density for the central component (at υ = 5.6 km s⁻¹) corresponding to the feature indicated by the arrow in the Ca I plot. The main component (at υ = −7.5 km s⁻¹) may show a small but systematic decrease in the column density over the same time period; no systematic changes are seen for the third component (at υ = 29.1 km s⁻¹). We note that the apparent component at υ ≈ 49 km s⁻¹ in the Na I UV line is in fact the second line in the doublet and thus not a real component.