Distributions of HI column densities (top), LOS depths (middle), and mean HI volume densities (bottom) in the Reticulum (magenta) and Eridu (green) clouds. The offset distance is the separation between a 1°-wide square along a filament and the first one (of largest latitude or declination). The different symbols refer to the fibre or shell cloud geometry. The latter provides upper/lower limits to the depth/density. The LOS depth shading is due to the distance uncertainty. The data points and error bars in volume density respectively give the mean value in each ~5 pc-wide square and the rms dispersion at 0.50.7 pc scale inside each square.