in 1854, daniel halladay invented the multibladed windpump (windmill) in the usa. it was perfected in 1883, and soon south africa (and elsewhere) produced them in large numbers. these windpumps transformed the great karoo, making permanent settlement and stock farming (predominantly sheep) possible over large parts of the karoo for the first time. like the karoo koppie, the multibladed windpump became an iconic feature of the great karoo.