Abundance ratios of the neutron-capture elements in Sculptor (blue), the Milky Way (grey), and UFDs (yellow): [Sr/Fe] (left) and [Ba/Fe] (middle) as a function of [Fe/H], and [Sr/Ba] (right) as a function of [Ba/H]. For reference, the [Sr/Ba] value of the r-process-enhanced star CS 22892-052 (Sneden et al. 2003) is noted with a green dashed line. Star symbols represent the Sculptor stars analysed here using new spectra, while blue circles are the stars that are re-analysed on archival spectra. Milky Way data come from Roederer et al. (2014), and UFD references are listed in the beginning of Sect. 5.