Complex sentence: Simon Stock became their first general (1247-65) but their origins go back to the twelfth century, to a hermit colony, which the crusader, Berthold of Calabria (d.1195) had instituted on Mount Carmel in 1185.
Split into simpler sentences: Simon Stock became their first general (1247-65). But their origins go back to the twelfth century, to a hermit colony, which the crusader, Berthold of Calabria (d.1195) had instituted on Mount Carmel in 1185.