Normalized spectra of the Si IV λλ1393,1402 and Al III λλ1854,1862 lines toward HD 62542. The profile of the λ2374 line of Fe II (the dominant form of Fe in primarily neutral gas) is shown for comparison. The absorption from the higher ions is not detected for the main neutral gas component near 14 km s⁻¹, but does overlap in velocity with the absorption from the other, weaker neutral gas components.