Comparison of our global best-fit model (thick black line) to the normalised FLAMES/GIRAFFE spectrum of CPD −57° 3509 (grey line), concentrating here on H, He i/ii, Si ii/iii/iv and Mg ii lines. The panels are centred on analysed lines, sorted according to chemical species (as indicated in the lower left of each panel), and, within a species, sorted along increasing wavelength. Line identifications are given.