Examples of the distribution of the normalised equivalent width (EN) of DIBs detected in various APO sight lines (with correlation fits and normalised Pearson coefficients kn) for three DIBs, including i) (a) two DIBs, λ6128 and λ6087, that are enhanced in the sight line of HD 175156, compared with all other sight lines (R_av(175156) = 3.0 and 3.9, η₁₇₅ = 4.1 and 7, respectively, Eqs. (7, 8), Table C.1); and ii) (b) a more normal DIB, λ5766, classified as ζ-type (Fan et al. 2022); the intensity of λ5766 in HD 175156, EN(5766), remains comparable with or lower than in some other sight lines (R_av(175156)= 1.2, η₁₇₅ =0.40). EN(6128) in HD 175156 is out of the correlation fit by a factor ~3. The errors bars for EN_i = EW_i/E(B − V) are built from the APO uncertainties on the EW and a systematic representative uncertainty on E(B − V) equal to 0.03 mag.