Spectra and column density map of Draco. Right panel: Herschel hydrogen column density map derived from dust in color in which the observed [C II] positions are indicated with black crosses. In the panels around, spectra of the [C II] 158 µm line and the H I 21 cm line (DRAO), both at ~1′ resolution, are displayed. We note that the H I line was reduced for better visibility. The green curve indicates a single Gaussian fit to the [C II] line.