The funeral sequence is precise. The body is washed and dressed in old but clean white clothes, and the sagdid is performed — a dog is brought to look at the corpse, a gaze held to drive off the corpse demon, and traditionally a four-eyed dog, meaning one with a spot above each eye, is preferred. A fire is kept burning in the room, at a distance, with sandalwood. The nasasalars, hereditary corpse-bearers, always work in pairs and carry the body on an iron bier — not wood, which would absorb pollution — to the dokhma, a circular stone tower open to the sky with three concentric rings of slabs for men, women and children, sloping toward a central well. The body is laid out and the clothes removed. Sun and birds reduce it within hours to a day; the dried bones are swept into the well, where lime and charcoal filters historically prevented seepage. The Doongerwadi complex in Mumbai, on fifty-odd acres of forest in the middle of the city, is the largest surviving site.