Detailed view of the [C ii] longitude-velocity contour plot of T_mb(K) associated with the Brick plotted over a map of a) CO(4–3) emission (Martin et al. 2004); b) HN¹³C Mopra data (this paper); and c) [C i] emission (Martin et al. 2004). The color bars give the values of T_mb(K) in the images; [C ii] contour levels are 2, 4, 6, 8, and 10 K, and the peak is 13.5 K; d) the velocity field and HNCO intensity of the Brick from Fig. 6 in Rathborne et al. (2014) where the color bar on the right is the velocity field in km s^-1 and the intensity is shown by the contours. This plot is in offsets from the nominal center of the Brick, (l, b) = (0.̊253, 0.̊016). The horizontal red line designates b = 0° and the blue arrows indicate the locations of the spectra shown in panels e) and f) which compare the GOT C+ [C ii] with the AST/RO [C i] and CO(4–3) spectra (Martin et al. 2004), and the Mopra HN¹³C spectra (this paper) at l = 0.̊250 and 0.̊21667, respectively. The red arrows in e) indicate the four velocity components identified by Henshaw et al. (2016b) in the vicinity of G0.253+0.016 at V_LSR ~ 7, 21, 38, and 70 km s^-1 from dense gas tracers. The HN¹³C peak at ~38.4 km s^-1 is the feature arising from the Brick at this position. The intensities are given as T_mb(K).