Herbert Edward Pretyman, Journal of Herbert Edward Pretyman written during his expedition to the Kittar Mountains… (1892)
“ When it rises, and only the point of the whipping top rests on the surface, the circular motion is harmless. It sometimes goes up into the air and, when the circular motion is interrupted, drops sand and small bushes over a large area. When depressed, and when the diameter of the whirlwind reaches twenty or thirty feet, it has great force, and a camel will lie down, blinded, and fearing to be blown over. These “devils” march or dance about the desert in parties often of ten or twelve, and look like weird giants on a sultry gloomy evening. ”
