Averaged spectra in each dendrogram cluster (Fig. E.6) in IC 1396A except cluster 2, which does not have a high enough S/N for the [¹³C II] analysis. Colored stepped data are the [C II] spectra (thick) and the combined and scaled [¹³C II] spectra (thin). The orange curve is the fit to the [¹³C II] spectra using two Gaussian profiles. Derived optical depths of [C II] are shown as black data points with error bars. See the main text for details.