According to the anthropologist Jeffrey Heath, Tuareg artisans belong to separate endogamous castes known as the "Inhædˤæn" ("Inadan"). These have included the blacksmith, jewelers, wood workers and leather artisan castes. They produced and repaired the saddles, tools, household items and other items for the Tuareg community. In Niger and Mali, where the largest Tuareg populations are found, the artisan castes were attached as clients to a family of nobles or vassals, and carried messages over distances for their patron family. They also are the ones who traditionally sacrifice animals during Islamic festivals.