A comparison of [Ca/Fe] as a function of [Fe/H] for stars in several dSph galaxies. • indicate Hercules (this study). Filled squares represent the ultra-faint dSph galaxies Ursa Major II, Coma Berenices, Boötes I and Leo IV (Feltzing et al. 2009; Frebel et al. 2010b; Norris et al. 2010; Simon et al. 2010). Open squares represent the classical dSph galaxies Draco, Sextans, Ursa Minor, Fornax, Carina and Sculptor (Shetrone et al. 2001, 2003; Sadakane et al. 2004; Koch et al. 2008a; Cohen & Huang 2009; Aoki et al. 2009; Frebel et al. 2010a). The solid ellipses outline RGB stars in the classical dSph galaxy Fornax from Letarte et al. (2007).