Abundance pattern of HD 42618 (upper panel) and HD 43587 (bottom panel) relative to the Sun. The abundances of elements based on two different ionisation stages (Si i/Si ii, Ti i/Ti ii, Cr i/Cr ii, and Fe i/Fe ii) are shown as triangles. For clarity, the points have been slightly shifted along the abscissa axis in this case. The open symbols denote abundances based on a single spectral line, whose uncertainty has been conservatively set to 0.05 dex. The dashed line shows the mean [Fe/H] abundance.